GDIPlus Bitmap.GetHeight() liefert 0

#include <Gdiplus.h>
...
#pragma comment(lib, "gdiplus.lib")

int WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hprevinst, LPSTR cmdline, int show)
{
	GdiplusStartupInput gdiplusStartupInput;
	ULONG_PTR gdiplusToken;
	GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

	Bitmap image = (L"C:\\Users\\User\Desktop\\Unbenannt.bmp");
	
	wchar_t wHeight[255];
	swprintf (wHeight, L"%u %u", image.GetHeight(), image.GetHeight());
	MessageBox (0, wHeight, L"", MB_OK); // Liefert "0 0"
...
        GdiplusShutdown(gdiplusToken);
...
}