모니터 Enumerate

http://thetweaker.wordpress.com/2011/11/13/reading-monitor-physical-dimensions-or-getting-the-edid-the-right-way/

#include <atlstr.h>

002	#include <SetupApi.h>

003	#pragma comment(lib, "setupapi.lib")

004

005	#define NAME_SIZE 128

006

007	const GUID GUID_CLASS_MONITOR = {0x4d36e96e, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18};

008

009	// Assumes hDevRegKey is valid

010	bool GetMonitorSizeFromEDID(const HKEY hDevRegKey, short& WidthMm, short& HeightMm)

011

{

012	DWORD dwType, AcutalValueNameLength = NAME_SIZE;

013	TCHAR valueName[NAME_SIZE];

014

015	BYTE EDIDdata[1024];

016	DWORD edidsize=sizeof(EDIDdata);

017

018	for (LONG i = 0, retValue = ERROR_SUCCESS; retValue != ERROR_NO_MORE_ITEMS; ++i)

019

{

020	retValue = RegEnumValue ( hDevRegKey, i, &valueName[0],

021	&AcutalValueNameLength, NULL, &dwType,

022	EDIDdata, // buffer

023	&edidsize); // buffer size

024

025	if (retValue != ERROR_SUCCESS || 0 != _tcscmp(valueName,_T("EDID")))

026

continue;

027

028	WidthMm  = ((EDIDdata[68] & 0xF0) << 4) + EDIDdata[66];

029	HeightMm = ((EDIDdata[68] & 0x0F) << 8) + EDIDdata[67];

030

031	return true; // valid EDID found

032

}

033

034	return false; // EDID not found

035

}

036

037	bool GetSizeForDevID(const CString& TargetDevID, short& WidthMm, short& HeightMm)

038

{

039	HDEVINFO devInfo = SetupDiGetClassDevsEx(

040	&GUID_CLASS_MONITOR, //class GUID

041	NULL, //enumerator

042	NULL, //HWND

043	DIGCF_PRESENT, // Flags //DIGCF_ALLCLASSES|

044	NULL, // device info, create a new one.

045	NULL, // machine name, local machine

046	NULL);// reserved

047

048	if (NULL == devInfo)

049	return false;

050

051	bool bRes = false;

052

053	for (ULONG i=0; ERROR_NO_MORE_ITEMS != GetLastError(); ++i)

054

{

055	SP_DEVINFO_DATA devInfoData;

056	memset(&devInfoData,0,sizeof(devInfoData));

057	devInfoData.cbSize = sizeof(devInfoData);

058

059	if (SetupDiEnumDeviceInfo(devInfo,i,&devInfoData))

060

{

061	HKEY hDevRegKey = SetupDiOpenDevRegKey(devInfo,&devInfoData,

062	DICS_FLAG_GLOBAL, 0, DIREG_DEV, KEY_READ);

063

064	if(!hDevRegKey || (hDevRegKey == INVALID_HANDLE_VALUE))

065

continue;

066

067	bRes = GetMonitorSizeFromEDID(hDevRegKey, WidthMm, HeightMm);

068

069	RegCloseKey(hDevRegKey);

070

}

071

}

072	SetupDiDestroyDeviceInfoList(devInfo);

073	return bRes;

074

}

075

076	int _tmain(int argc, _TCHAR* argv[])

077

{

078	short WidthMm, HeightMm;

079

080	DISPLAY_DEVICE dd;

081	dd.cb = sizeof(dd);

082	DWORD dev = 0; // device index

083	int id = 1; // monitor number, as used by Display Properties > Settings

084

085	CString DeviceID;

086	bool bFoundDevice = false;

087	while (EnumDisplayDevices(0, dev, &dd, 0) && !bFoundDevice)

088

{

089	DISPLAY_DEVICE ddMon;

090	ZeroMemory(&ddMon, sizeof(ddMon));

091	ddMon.cb = sizeof(ddMon);

092	DWORD devMon = 0;

093

094	while (EnumDisplayDevices(dd.DeviceName, devMon, &ddMon, 0) && !bFoundDevice)

095

{

096	if (ddMon.StateFlags & DISPLAY_DEVICE_ACTIVE &&

097	!(ddMon.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER))

098

{

099	DeviceID.Format (L"%s", ddMon.DeviceID);

100	DeviceID = DeviceID.Mid (8, DeviceID.Find (L"\\", 9) - 8);

101

102	bFoundDevice = GetSizeForDevID(DeviceID, WidthMm, HeightMm);

103

}

104

devMon++;

105

106	ZeroMemory(&ddMon, sizeof(ddMon));

107	ddMon.cb = sizeof(ddMon);

108

}

109

110	ZeroMemory(&dd, sizeof(dd));

111	dd.cb = sizeof(dd);

112

dev++;

113

}

114

115

return 0;

116

}