public static extern int SetPixelFormat(IntPtr hdc, int iPixelFormat, ref Structures.PIXELFORMATDESCRIPTOR pfd);
public static extern int ChoosePixelFormat(IntPtr hdc, ref Structures.PIXELFORMATDESCRIPTOR pfd);
public static extern int SetPixelFormat(IntPtr hdc, int iPixelFormat, ref Structures.PIXELFORMATDESCRIPTOR pfd);
public static extern int ChoosePixelFormat(IntPtr hdc, ref Structures.PIXELFORMATDESCRIPTOR pfd);