internal static extern bool DeleteDC(DeviceContextHandle deviceContextHandle);
internal static extern bool ReleaseDC([In] IntPtr windowHandle, [In] DeviceContextHandle deviceContextHandle);
internal static extern bool SetDeviceGammaRamp(DeviceContextHandle deviceContextHandle, ref GammaRamp ramp);
internal static extern int GetDeviceCaps(DeviceContextHandle deviceContextHandle, DeviceCapability index);