public void GetWindowRectangle(out int x, out int y, out int width, out int height)
{
var rect = new Win32Rectangle();
Functions.GetWindowRect(this.Handle, ref rect);
var parent = Functions.GetParent(this.Handle);
var point = new Point(rect.Left, rect.Top);
Functions.ScreenToClient(parent, ref point);
x = point.X;
y = point.Y;
width = rect.Width;
height = rect.Height;
}
public static extern int FillRect(IntPtr hdc, ref Win32Rectangle rect, IntPtr intPtr);
public static extern bool GetWindowRect(IntPtr hWnd, ref Win32Rectangle rect);
public static extern bool AdjustWindowRectEx(
ref Win32Rectangle lpRect,
WindowStyle dwStyle,
[MarshalAs(UnmanagedType.Bool)] bool bMenu,
ExtendedWindowStyle dwExStyle);