public static extern bool GetWindowRect(IntPtr hWnd, out Structs.Rect RECT);
public static extern bool GetClientRect(IntPtr hWnd, out Structs.Rect RECT);
public static extern bool GetWindowRect(IntPtr hWnd, out Structs.Rect RECT);
public static extern bool GetClientRect(IntPtr hWnd, out Structs.Rect RECT);