特定显示器调整主副屏、方向、位置

inline char* UnicodeToAnsi(const wchar_t* szStr)
{
int nLen = WideCharToMultiByte(CP_ACP, 0, szStr, -1, NULL, 0, NULL, NULL);
if (nLen == 0){
return NULL;
}
char* pResult = new char[nLen];
WideCharToMultiByte(CP_ACP, 0, szStr, -1, pResult, nLen, NULL, NULL);
return pResult;
}

extern “C” __declspec(dllexport) bool ToSetPrimaryDisPlay(){

DEVMODE deviceMode;
deviceMode.dmSize = sizeof(DEVMODE);
deviceMode.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL | DM_POSITION | DM_DISPLAYFREQUENCY | DM_DISPLAYFLAGS;
DISPLAY_DEVICE DisplayDevice;
DISPLAY_DEVICE DisPlay_Info;
ZeroMemory(&DisplayDevice, sizeof(DISPLAY_DEVICE));
DisplayDevice.cb = sizeof(DisplayDevice);

ZeroMemory(&DisPlay_Info, sizeof(DISPLAY_DEVICE));
DisPlay_Info.cb = sizeof(DisPlay_Info);

int old_Coord_X = 0;
int old_Coord_Y = 0;

SetDisplayConfig(0, NULL, 0, NULL, (SDC_APPLY | SDC_TOPOLOGY_EXTEND));

for (int i = 0; EnumDisplayDevices(NULL, i, &DisplayDevice, 0); i++)
{
    //EnumDisplayDevices函数是用来枚举显示设备的，第一个调用会得到所有显示器，
    //将第一次枚举得到的显示器名字作为参数再传入EnumDisplayDevices，将会得到
    //显示器的硬件名称
    EnumDisplayDevices(DisplayDevice.DeviceName, 0, &DisPlay_Info, 0);

//获取到特定名称的显示器，在这里MONITOR\IMR00是特定的显示器硬件名称
if (strstr(UnicodeToAnsi(DisPlay_Info.DeviceID), “MONITOR\IMR00”) != NULL || strstr(UnicodeToAnsi(DisPlay_Info.DeviceID), “MONITOR\IVR00”) != NULL)
{
//枚举显示器属性，
EnumDisplaySettings(DisplayDevice.DeviceName, ENUM_CURRENT_SETTINGS, &deviceMode);
//以下标识符，代表本次操作更新注册表；
DWORD dwFlags = CDS_UPDATEREGISTRY;

        //调整顺序按照调整主副屏、调整横竖屏、调整位置的操作进行，
        //判断特定显示器是否为主显示器;
        if (DisplayDevice.StateFlags &DISPLAY_DEVICE_PRIMARY_DEVICE){
            cout << "需要调整主副屏" << endl;
            old_Coord_X = deviceMode.dmPosition.x;
            old_Coord_Y = deviceMode.dmPosition.y;
            deviceMode.dmPosition.x = -1920;
            deviceMode.dmPosition.y = 0;
            if (DISP_CHANGE_SUCCESSFUL != ChangeDisplaySettingsEx(DisplayDevice.DeviceName, &deviceMode, NULL, dwFlags, NULL)){
                //return false;
                cout << "设置主副屏失败" << endl;
            }
        }
        //判断特定显示器是否需要调整方向
        if (deviceMode.dmDisplayOrientation != DMDO_90){
            cout << "需要调整横竖屏" << endl;
            deviceMode.dmDisplayOrientation = DMDO_90;
            if (deviceMode.dmPelsHeight != 1080){
                int temp = deviceMode.dmPelsHeight;
                deviceMode.dmPelsHeight = deviceMode.dmPelsWidth;
                deviceMode.dmPelsWidth = temp;
            }
            if (DISP_CHANGE_SUCCESSFUL != ChangeDisplaySettingsEx(DisplayDevice.DeviceName, &deviceMode, NULL, CDS_UPDATEREGISTRY, NULL)){
                cout << "设置横竖屏失败" << endl;
            }
        }

        //判断特定显示器是否需要调整位置
        if (deviceMode.dmPosition.x < 0){
            cout << "需要调整位置" << endl;
            deviceMode.dmPosition.x = GetSystemMetrics(SM_CXSCREEN);
            deviceMode.dmPosition.y = 0;
            if (DISP_CHANGE_SUCCESSFUL != ChangeDisplaySettingsEx(DisplayDevice.DeviceName, &deviceMode, NULL, CDS_UPDATEREGISTRY, NULL)){
                //ChangeDisplaySettingsEx(0, 0, 0, 0, 0);
                cout << "移动屏幕失败" << endl;
            }
        }
    }
}
return true;

}