C# Right click Pinvoke w/ coord conversion for UI automation

gistfile1.cs

public static class NativeMethods
{
	[DllImport("user32.dll")]
	internal static extern void mouse_event([In]uint dwFlags, [In]int dx, [In]int dy, [In]uint dwData, [In]uint dwExtraInfo);

	[Flags]
	internal enum MOUSEEVENTF : uint
	{
		MOVE			= 0x00001,
		LEFTDOWN		= 0x00002,
		LEFTUP			= 0x00004,
		RIGHTDOWN		= 0x00008,
		RIGHTUP			= 0x00010,
		MIDDLEDOWN		= 0x00020,
		MIDDLEUP		= 0x00040,
		XDOWN			= 0x00080,
		XUP				= 0x00100,
		WHEEL			= 0x00800,						
		HWHEEL			= 0x01000,
		MOVE_NOCOALESCE = 0x02000,
		VIRTUALDESK		= 0x04000,
		ABSOLUTE		= 0x08000,			
	}

	private static int MouseCoordToNormalized(int coord, int width_or_height) 
	{
		return ((65536 * coord) / width_or_height) + 1;
	}

	public static void RightClickPoint(int x, int y)
	{
		int totalWidth = System.Windows.Forms.Screen.PrimaryScreen.WorkingArea.Width; //NativeMethods.GetSystemMetrics(NativeMethods.SM_CXSCREEN);
		int totalHeight = System.Windows.Forms.Screen.PrimaryScreen.WorkingArea.Height; //NativeMethods.GetSystemMetrics(NativeMethods.SM_CYSCREEN);
		x = MouseCoordToNormalized(x, totalWidth);
		y = MouseCoordToNormalized(y, totalHeight);
		mouse_event((uint)(MOUSEEVENTF.MOVE | MOUSEEVENTF.ABSOLUTE  | MOUSEEVENTF.RIGHTDOWN), x, y, 0, 0);
		mouse_event((uint)(MOUSEEVENTF.MOVE | MOUSEEVENTF.ABSOLUTE  | MOUSEEVENTF.RIGHTUP), x, y, 0, 0);
	}
}