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485 lines
14 KiB
C
485 lines
14 KiB
C
//=============================================================================
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//
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// multimon.h -- Stub module that fakes multiple monitor apis on Win32 OSes
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// without them.
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//
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// By using this header your code will get back default values from
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// GetSystemMetrics() for new metrics, and the new multimonitor APIs
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// will act like only one display is present on a Win32 OS without
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// multimonitor APIs.
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//
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// Exactly one source must include this with COMPILE_MULTIMON_STUBS defined.
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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//=============================================================================
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#ifdef __cplusplus
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extern "C" { // Assume C declarations for C++
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#endif // __cplusplus
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//
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// If we are building with Win95/NT4 headers, we need to declare
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// the multimonitor-related metrics and APIs ourselves.
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//
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#ifndef SM_CMONITORS
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#define SM_XVIRTUALSCREEN 76
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#define SM_YVIRTUALSCREEN 77
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#define SM_CXVIRTUALSCREEN 78
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#define SM_CYVIRTUALSCREEN 79
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#define SM_CMONITORS 80
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#define SM_SAMEDISPLAYFORMAT 81
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// HMONITOR is already declared if WINVER >= 0x0500 in windef.h
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// This is for components built with an older version number.
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//
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#if !defined(HMONITOR_DECLARED) && (WINVER < 0x0500)
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DECLARE_HANDLE(HMONITOR);
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#define HMONITOR_DECLARED
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#endif
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#define MONITOR_DEFAULTTONULL 0x00000000
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#define MONITOR_DEFAULTTOPRIMARY 0x00000001
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#define MONITOR_DEFAULTTONEAREST 0x00000002
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#define MONITORINFOF_PRIMARY 0x00000001
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typedef struct tagMONITORINFO
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{
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DWORD cbSize;
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RECT rcMonitor;
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RECT rcWork;
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DWORD dwFlags;
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} MONITORINFO, *LPMONITORINFO;
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#ifndef CCHDEVICENAME
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#define CCHDEVICENAME 32
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#endif
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#ifdef __cplusplus
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typedef struct tagMONITORINFOEXA : public tagMONITORINFO
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{
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CHAR szDevice[CCHDEVICENAME];
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} MONITORINFOEXA, *LPMONITORINFOEXA;
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typedef struct tagMONITORINFOEXW : public tagMONITORINFO
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{
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WCHAR szDevice[CCHDEVICENAME];
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} MONITORINFOEXW, *LPMONITORINFOEXW;
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#ifdef UNICODE
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typedef MONITORINFOEXW MONITORINFOEX;
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typedef LPMONITORINFOEXW LPMONITORINFOEX;
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#else
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typedef MONITORINFOEXA MONITORINFOEX;
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typedef LPMONITORINFOEXA LPMONITORINFOEX;
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#endif // UNICODE
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#else // ndef __cplusplus
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typedef struct tagMONITORINFOEXA
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{
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MONITORINFO;
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CHAR szDevice[CCHDEVICENAME];
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} MONITORINFOEXA, *LPMONITORINFOEXA;
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typedef struct tagMONITORINFOEXW
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{
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MONITORINFO;
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WCHAR szDevice[CCHDEVICENAME];
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} MONITORINFOEXW, *LPMONITORINFOEXW;
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#ifdef UNICODE
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typedef MONITORINFOEXW MONITORINFOEX;
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typedef LPMONITORINFOEXW LPMONITORINFOEX;
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#else
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typedef MONITORINFOEXA MONITORINFOEX;
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typedef LPMONITORINFOEXA LPMONITORINFOEX;
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#endif // UNICODE
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#endif
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typedef BOOL (CALLBACK* MONITORENUMPROC)(HMONITOR, HDC, LPRECT, LPARAM);
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#ifndef DISPLAY_DEVICE_ATTACHED_TO_DESKTOP
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typedef struct _DISPLAY_DEVICEA {
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DWORD cb;
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CHAR DeviceName[32];
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CHAR DeviceString[128];
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DWORD StateFlags;
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CHAR DeviceID[128];
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CHAR DeviceKey[128];
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} DISPLAY_DEVICEA, *PDISPLAY_DEVICEA, *LPDISPLAY_DEVICEA;
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typedef struct _DISPLAY_DEVICEW {
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DWORD cb;
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WCHAR DeviceName[32];
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WCHAR DeviceString[128];
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DWORD StateFlags;
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WCHAR DeviceID[128];
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WCHAR DeviceKey[128];
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} DISPLAY_DEVICEW, *PDISPLAY_DEVICEW, *LPDISPLAY_DEVICEW;
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#ifdef UNICODE
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typedef DISPLAY_DEVICEW DISPLAY_DEVICE;
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typedef PDISPLAY_DEVICEW PDISPLAY_DEVICE;
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typedef LPDISPLAY_DEVICEW LPDISPLAY_DEVICE;
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#else
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typedef DISPLAY_DEVICEA DISPLAY_DEVICE;
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typedef PDISPLAY_DEVICEA PDISPLAY_DEVICE;
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typedef LPDISPLAY_DEVICEA LPDISPLAY_DEVICE;
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#endif // UNICODE
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#define DISPLAY_DEVICE_ATTACHED_TO_DESKTOP 0x00000001
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#define DISPLAY_DEVICE_MULTI_DRIVER 0x00000002
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#define DISPLAY_DEVICE_PRIMARY_DEVICE 0x00000004
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#define DISPLAY_DEVICE_MIRRORING_DRIVER 0x00000008
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#define DISPLAY_DEVICE_VGA_COMPATIBLE 0x00000010
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#endif
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#endif // SM_CMONITORS
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#undef GetMonitorInfo
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#undef GetSystemMetrics
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#undef MonitorFromWindow
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#undef MonitorFromRect
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#undef MonitorFromPoint
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#undef EnumDisplayMonitors
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#undef EnumDisplayDevices
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//
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// Define COMPILE_MULTIMON_STUBS to compile the stubs;
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// otherwise, you get the declarations.
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//
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#ifdef COMPILE_MULTIMON_STUBS
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//-----------------------------------------------------------------------------
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//
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// Implement the API stubs.
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//
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//-----------------------------------------------------------------------------
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#ifndef MULTIMON_FNS_DEFINED
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int (WINAPI* g_pfnGetSystemMetrics)(int) = NULL;
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HMONITOR (WINAPI* g_pfnMonitorFromWindow)(HWND, DWORD) = NULL;
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HMONITOR (WINAPI* g_pfnMonitorFromRect)(LPCRECT, DWORD) = NULL;
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HMONITOR (WINAPI* g_pfnMonitorFromPoint)(POINT, DWORD) = NULL;
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BOOL (WINAPI* g_pfnGetMonitorInfo)(HMONITOR, LPMONITORINFO) = NULL;
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BOOL (WINAPI* g_pfnEnumDisplayMonitors)(HDC, LPCRECT, MONITORENUMPROC, LPARAM) = NULL;
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BOOL (WINAPI* g_pfnEnumDisplayDevices)(PVOID, DWORD, PDISPLAY_DEVICE,DWORD) = NULL;
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BOOL g_fMultiMonInitDone = FALSE;
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BOOL g_fMultimonPlatformNT = FALSE;
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#endif
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BOOL IsPlatformNT()
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{
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OSVERSIONINFOA osvi = {0};
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osvi.dwOSVersionInfoSize = sizeof(osvi);
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GetVersionExA((OSVERSIONINFOA*)&osvi);
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return (VER_PLATFORM_WIN32_NT == osvi.dwPlatformId);
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}
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BOOL InitMultipleMonitorStubs(void)
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{
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HMODULE hUser32;
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if (g_fMultiMonInitDone)
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{
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return g_pfnGetMonitorInfo != NULL;
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}
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g_fMultimonPlatformNT = IsPlatformNT();
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hUser32 = GetModuleHandle(TEXT("USER32"));
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if (hUser32 &&
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(*(FARPROC*)&g_pfnGetSystemMetrics = GetProcAddress(hUser32,"GetSystemMetrics")) != NULL &&
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(*(FARPROC*)&g_pfnMonitorFromWindow = GetProcAddress(hUser32,"MonitorFromWindow")) != NULL &&
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(*(FARPROC*)&g_pfnMonitorFromRect = GetProcAddress(hUser32,"MonitorFromRect")) != NULL &&
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(*(FARPROC*)&g_pfnMonitorFromPoint = GetProcAddress(hUser32,"MonitorFromPoint")) != NULL &&
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(*(FARPROC*)&g_pfnEnumDisplayMonitors = GetProcAddress(hUser32,"EnumDisplayMonitors")) != NULL &&
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#ifdef UNICODE
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(*(FARPROC*)&g_pfnEnumDisplayDevices = GetProcAddress(hUser32,"EnumDisplayDevicesW")) != NULL &&
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(*(FARPROC*)&g_pfnGetMonitorInfo = g_fMultimonPlatformNT ? GetProcAddress(hUser32,"GetMonitorInfoW") :
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GetProcAddress(hUser32,"GetMonitorInfoA")) != NULL
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#else
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(*(FARPROC*)&g_pfnGetMonitorInfo = GetProcAddress(hUser32,"GetMonitorInfoA")) != NULL &&
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(*(FARPROC*)&g_pfnEnumDisplayDevices = GetProcAddress(hUser32,"EnumDisplayDevicesA")) != NULL
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#endif
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) {
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g_fMultiMonInitDone = TRUE;
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return TRUE;
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}
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else
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{
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g_pfnGetSystemMetrics = NULL;
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g_pfnMonitorFromWindow = NULL;
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g_pfnMonitorFromRect = NULL;
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g_pfnMonitorFromPoint = NULL;
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g_pfnGetMonitorInfo = NULL;
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g_pfnEnumDisplayMonitors = NULL;
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g_pfnEnumDisplayDevices = NULL;
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g_fMultiMonInitDone = TRUE;
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return FALSE;
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}
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}
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//-----------------------------------------------------------------------------
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//
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// fake implementations of Monitor APIs that work with the primary display
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// no special parameter validation is made since these run in client code
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//
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//-----------------------------------------------------------------------------
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int WINAPI
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xGetSystemMetrics(int nIndex)
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{
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if (InitMultipleMonitorStubs())
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return g_pfnGetSystemMetrics(nIndex);
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switch (nIndex)
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{
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case SM_CMONITORS:
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case SM_SAMEDISPLAYFORMAT:
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return 1;
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case SM_XVIRTUALSCREEN:
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case SM_YVIRTUALSCREEN:
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return 0;
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case SM_CXVIRTUALSCREEN:
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nIndex = SM_CXSCREEN;
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break;
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case SM_CYVIRTUALSCREEN:
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nIndex = SM_CYSCREEN;
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break;
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}
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return GetSystemMetrics(nIndex);
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}
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#define xPRIMARY_MONITOR ((HMONITOR)0x12340042)
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HMONITOR WINAPI
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xMonitorFromPoint(POINT ptScreenCoords, DWORD dwFlags)
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{
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if (InitMultipleMonitorStubs())
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return g_pfnMonitorFromPoint(ptScreenCoords, dwFlags);
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if ((dwFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST)) ||
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((ptScreenCoords.x >= 0) &&
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(ptScreenCoords.x < GetSystemMetrics(SM_CXSCREEN)) &&
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(ptScreenCoords.y >= 0) &&
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(ptScreenCoords.y < GetSystemMetrics(SM_CYSCREEN))))
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{
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return xPRIMARY_MONITOR;
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}
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return NULL;
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}
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HMONITOR WINAPI
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xMonitorFromRect(LPCRECT lprcScreenCoords, DWORD dwFlags)
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{
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if (InitMultipleMonitorStubs())
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return g_pfnMonitorFromRect(lprcScreenCoords, dwFlags);
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if ((dwFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST)) ||
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((lprcScreenCoords->right > 0) &&
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(lprcScreenCoords->bottom > 0) &&
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(lprcScreenCoords->left < GetSystemMetrics(SM_CXSCREEN)) &&
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(lprcScreenCoords->top < GetSystemMetrics(SM_CYSCREEN))))
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{
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return xPRIMARY_MONITOR;
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}
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return NULL;
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}
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HMONITOR WINAPI
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xMonitorFromWindow(HWND hWnd, DWORD dwFlags)
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{
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WINDOWPLACEMENT wp;
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if (InitMultipleMonitorStubs())
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return g_pfnMonitorFromWindow(hWnd, dwFlags);
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if (dwFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST))
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return xPRIMARY_MONITOR;
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if (IsIconic(hWnd) ?
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GetWindowPlacement(hWnd, &wp) :
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GetWindowRect(hWnd, &wp.rcNormalPosition)) {
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return xMonitorFromRect(&wp.rcNormalPosition, dwFlags);
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}
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return NULL;
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}
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BOOL WINAPI
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xGetMonitorInfo(HMONITOR hMonitor, LPMONITORINFO lpMonitorInfo)
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{
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RECT rcWork;
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if (InitMultipleMonitorStubs())
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{
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BOOL f = g_pfnGetMonitorInfo(hMonitor, lpMonitorInfo);
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#ifdef UNICODE
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if (f && !g_fMultimonPlatformNT && (lpMonitorInfo->cbSize >= sizeof(MONITORINFOEX)))
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{
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MultiByteToWideChar(CP_ACP, 0,
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(LPSTR)((MONITORINFOEX*)lpMonitorInfo)->szDevice, -1,
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((MONITORINFOEX*)lpMonitorInfo)->szDevice, (sizeof(((MONITORINFOEX*)lpMonitorInfo)->szDevice)/sizeof(TCHAR)));
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}
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#endif
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return f;
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}
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if ((hMonitor == xPRIMARY_MONITOR) &&
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lpMonitorInfo &&
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(lpMonitorInfo->cbSize >= sizeof(MONITORINFO)) &&
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SystemParametersInfoA(SPI_GETWORKAREA, 0, &rcWork, 0))
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{
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lpMonitorInfo->rcMonitor.left = 0;
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lpMonitorInfo->rcMonitor.top = 0;
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lpMonitorInfo->rcMonitor.right = GetSystemMetrics(SM_CXSCREEN);
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lpMonitorInfo->rcMonitor.bottom = GetSystemMetrics(SM_CYSCREEN);
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lpMonitorInfo->rcWork = rcWork;
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lpMonitorInfo->dwFlags = MONITORINFOF_PRIMARY;
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if (lpMonitorInfo->cbSize >= sizeof(MONITORINFOEX))
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{
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#ifdef UNICODE
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MultiByteToWideChar(CP_ACP, 0, "DISPLAY", -1, ((MONITORINFOEX*)lpMonitorInfo)->szDevice, (sizeof(((MONITORINFOEX*)lpMonitorInfo)->szDevice)/sizeof(TCHAR)));
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#else // UNICODE
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lstrcpy(((MONITORINFOEX*)lpMonitorInfo)->szDevice, TEXT("DISPLAY"));
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#endif // UNICODE
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}
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return TRUE;
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}
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return FALSE;
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}
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BOOL WINAPI
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xEnumDisplayMonitors(
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HDC hdcOptionalForPainting,
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LPCRECT lprcEnumMonitorsThatIntersect,
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MONITORENUMPROC lpfnEnumProc,
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LPARAM dwData)
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{
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RECT rcLimit;
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if (InitMultipleMonitorStubs()) {
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return g_pfnEnumDisplayMonitors(
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hdcOptionalForPainting,
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lprcEnumMonitorsThatIntersect,
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lpfnEnumProc,
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dwData);
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}
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if (!lpfnEnumProc)
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return FALSE;
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rcLimit.left = 0;
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rcLimit.top = 0;
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rcLimit.right = GetSystemMetrics(SM_CXSCREEN);
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rcLimit.bottom = GetSystemMetrics(SM_CYSCREEN);
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if (hdcOptionalForPainting)
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{
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RECT rcClip;
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POINT ptOrg;
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switch (GetClipBox(hdcOptionalForPainting, &rcClip))
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{
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default:
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if (!GetDCOrgEx(hdcOptionalForPainting, &ptOrg))
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return FALSE;
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OffsetRect(&rcLimit, -ptOrg.x, -ptOrg.y);
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if (IntersectRect(&rcLimit, &rcLimit, &rcClip) &&
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(!lprcEnumMonitorsThatIntersect ||
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IntersectRect(&rcLimit, &rcLimit, lprcEnumMonitorsThatIntersect))) {
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break;
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}
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//fall thru
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case NULLREGION:
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return TRUE;
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case ERROR:
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return FALSE;
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}
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} else {
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if ( lprcEnumMonitorsThatIntersect &&
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!IntersectRect(&rcLimit, &rcLimit, lprcEnumMonitorsThatIntersect)) {
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return TRUE;
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}
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}
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return lpfnEnumProc(
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xPRIMARY_MONITOR,
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hdcOptionalForPainting,
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&rcLimit,
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dwData);
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}
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BOOL WINAPI
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xEnumDisplayDevices(
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PVOID Unused,
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DWORD iDevNum,
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PDISPLAY_DEVICE lpDisplayDevice,
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DWORD dwFlags)
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{
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if (InitMultipleMonitorStubs())
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return g_pfnEnumDisplayDevices(Unused, iDevNum, lpDisplayDevice, dwFlags);
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if (Unused != NULL)
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return FALSE;
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if (iDevNum != 0)
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return FALSE;
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if (lpDisplayDevice == NULL || lpDisplayDevice->cb < sizeof(DISPLAY_DEVICE))
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return FALSE;
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#ifdef UNICODE
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MultiByteToWideChar(CP_ACP, 0, "DISPLAY", -1, lpDisplayDevice->DeviceName, (sizeof(lpDisplayDevice->DeviceName)/sizeof(TCHAR)));
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MultiByteToWideChar(CP_ACP, 0, "DISPLAY", -1, lpDisplayDevice->DeviceString, (sizeof(lpDisplayDevice->DeviceName)/sizeof(TCHAR)));
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#else // UNICODE
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lstrcpy((LPTSTR)lpDisplayDevice->DeviceName, TEXT("DISPLAY"));
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lstrcpy((LPTSTR)lpDisplayDevice->DeviceString, TEXT("DISPLAY"));
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#endif // UNICODE
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lpDisplayDevice->StateFlags = DISPLAY_DEVICE_ATTACHED_TO_DESKTOP | DISPLAY_DEVICE_PRIMARY_DEVICE;
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return TRUE;
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}
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#undef xPRIMARY_MONITOR
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#undef COMPILE_MULTIMON_STUBS
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#else // COMPILE_MULTIMON_STUBS
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extern int WINAPI xGetSystemMetrics(int);
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extern HMONITOR WINAPI xMonitorFromWindow(HWND, DWORD);
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extern HMONITOR WINAPI xMonitorFromRect(LPCRECT, DWORD);
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extern HMONITOR WINAPI xMonitorFromPoint(POINT, DWORD);
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extern BOOL WINAPI xGetMonitorInfo(HMONITOR, LPMONITORINFO);
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extern BOOL WINAPI xEnumDisplayMonitors(HDC, LPCRECT, MONITORENUMPROC, LPARAM);
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extern BOOL WINAPI xEnumDisplayDevices(PVOID, DWORD, PDISPLAY_DEVICE, DWORD);
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#endif // COMPILE_MULTIMON_STUBS
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//
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// build defines that replace the regular APIs with our versions
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//
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#define GetSystemMetrics xGetSystemMetrics
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#define MonitorFromWindow xMonitorFromWindow
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#define MonitorFromRect xMonitorFromRect
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#define MonitorFromPoint xMonitorFromPoint
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#define GetMonitorInfo xGetMonitorInfo
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#define EnumDisplayMonitors xEnumDisplayMonitors
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#define EnumDisplayDevices xEnumDisplayDevices
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#ifdef __cplusplus
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}
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#endif // __cplusplus
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