Win32-Wait-For-VSYNCH

handle.cpp

typedef LONG NTSTATUS;
typedef UINT D3DKMT_HANDLE;
typedef UINT D3DDDI_VIDEO_PRESENT_SOURCE_ID;

#define STATUS_SUCCESS ((NTSTATUS)0x00000000L)
#define STATUS_NOT_IMPLEMENTED ((NTSTATUS)0xC0000002L)

typedef struct _D3DKMT_WAITFORVERTICALBLANKEVENT {
	D3DKMT_HANDLE hAdapter; // in: adapter handle
	D3DKMT_HANDLE hDevice; // in: device handle [Optional]
	D3DDDI_VIDEO_PRESENT_SOURCE_ID VidPnSourceId; // in: adapter's VidPN Source ID
} D3DKMT_WAITFORVERTICALBLANKEVENT;

typedef struct _D3DKMT_OPENADAPTERFROMHDC {
	HDC hDc; // in:  DC that maps to a single display
	D3DKMT_HANDLE hAdapter; // out: adapter handle
	LUID AdapterLuid; // out: adapter LUID
	D3DDDI_VIDEO_PRESENT_SOURCE_ID VidPnSourceId; // out: VidPN source ID for that particular display
} D3DKMT_OPENADAPTERFROMHDC;

extern "C" {
	NTSTATUS __cdecl D3DKMTWaitForVerticalBlankEvent(const D3DKMT_WAITFORVERTICALBLANKEVENT*);
	NTSTATUS __cdecl D3DKMTOpenAdapterFromHdc(D3DKMT_OPENADAPTERFROMHDC* lpParams);
}

D3DKMT_WAITFORVERTICALBLANKEVENT GetVBlankHandle() {
	//https://docs.microsoft.com/en-us/windows/desktop/gdi/getting-information-on-a-display-monitor
	DISPLAY_DEVICE dd;
	dd.cb = sizeof(DISPLAY_DEVICE);

	DWORD deviceNum = 0;
	while (EnumDisplayDevices(NULL, deviceNum, &dd, 0)) {
		if (dd.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE) {
			break;
		}
		deviceNum++;
	}

	HDC hdc = CreateDC(NULL, dd.DeviceName, NULL, NULL);
	if (hdc == NULL) {
		//error("CreateDC failed");
	}

	D3DKMT_OPENADAPTERFROMHDC OpenAdapterData;
	OpenAdapterData.hDc = hdc;
	if (STATUS_SUCCESS != D3DKMTOpenAdapterFromHdc(&OpenAdapterData)) {
		//error("failed to open adapter from hDc");
	}
	DeleteDC(hdc);

	D3DKMT_WAITFORVERTICALBLANKEVENT we;
	we.hAdapter = OpenAdapterData.hAdapter;
	we.hDevice = 0;
	we.VidPnSourceId = OpenAdapterData.VidPnSourceId;

	return we;
}

usage.cpp

// In init
auto VBlankHandle = GetVBlankHandle();

// In game loop
SwapBuffers(hdc);
D3DKMTWaitForVerticalBlankEvent(&VBlankHandle);

Thank you!