public static extern int GetWindowLongA( IntPtr hWnd, SetWindowLongType nIndex);
public static extern int GetWindowLongA(IntPtr hWnd, SetWindowLongType nIndex);
public static extern int SetWindowLongA( IntPtr hWnd, SetWindowLongType nIndex, WindowsExtendedStyle dwNewLong);
public static extern int SetWindowLongA(IntPtr hWnd, SetWindowLongType nIndex, WindowExStyles dwNewLong);