static extern bool GetWindowRect(IntPtr hWnd, out NativeRectangle lpRect);
static extern bool GetClientRect(IntPtr hWnd, out NativeRectangle lpRect);
public static extern bool AdjustWindowRect(ref NativeRectangle lpRect, uint dwStyle, [MarshalAs(UnmanagedType.Bool)]bool bMenu);
public static extern bool AdjustWindowRect(ref NativeRectangle lpRect, uint dwStyle, [MarshalAs(UnmanagedType.Bool)] bool bMenu);