Obtención de información en un monitor de pantalla

En el ejemplo de código siguiente se muestra cómo usar EnumDisplayDevices para obtener información sobre un monitor de pantalla.

BOOL GetDisplayMonitorInfo(int nDeviceIndex, LPSTR lpszMonitorInfo)
{
    FARPROC EnumDisplayDevices;
    HINSTANCE  hInstUser32;
    DISPLAY_DEVICE DispDev; 
    char szSaveDeviceName[33];  // 32 + 1 for the null-terminator 
    BOOL bRet = TRUE;
        HRESULT hr;
    
    hInstUser32 = LoadLibrary("c:\\windows\User32.DLL");
    if (!hInstUser32) return FALSE;  
    
    // Get the address of the EnumDisplayDevices function 
    EnumDisplayDevices = (FARPROC)GetProcAddress(hInstUser32,"EnumDisplayDevicesA");
    if (!EnumDisplayDevices) {
        FreeLibrary(hInstUser32);
        return FALSE;
    }

    ZeroMemory(&DispDev, sizeof(DispDev));
    DispDev.cb = sizeof(DispDev); 
    
    // After the first call to EnumDisplayDevices,  
    // DispDev.DeviceString is the adapter name 
    if (EnumDisplayDevices(NULL, nDeviceIndex, &DispDev, 0)) 
        {  
                hr = StringCchCopy(szSaveDeviceName, 33, DispDev.DeviceName);
                if (FAILED(hr))
                {
                // TODO: write error handler 
                }
        
        // After second call, DispDev.DeviceString is the  
        // monitor name for that device  
        EnumDisplayDevices(szSaveDeviceName, 0, &DispDev, 0);   
        
                // In the following, lpszMonitorInfo must be 128 + 1 for  
                // the null-terminator. 
                hr = StringCchCopy(lpszMonitorInfo, 129, DispDev.DeviceString);
                if (FAILED(hr))
                {
                // TODO: write error handler 
                }
                
    } else    {
        bRet = FALSE;
    }

    FreeLibrary(hInstUser32);

    return bRet;
}