[DllImport("user32.dll", EntryPoint = "SetWindowLongPtr")] static extern IntPtr SetWindowLongPtr64(IntPtr hWnd, WindowFieldOffset nIndex, IntPtr dwNewLong);
public static IntPtr SetWindowLongPtr(IntPtr hWnd, WindowFieldOffset nIndex, IntPtr dwNewLong)
=> IntPtr.Size == 8
? SetWindowLongPtr64(hWnd, nIndex, dwNewLong)
: new IntPtr(SetWindowLong32(hWnd, nIndex, dwNewLong.ToInt32()));
[DllImport("user32.dll", EntryPoint = "SetWindowLong")] static extern int SetWindowLong32(IntPtr hWnd, WindowFieldOffset nIndex, int dwNewLong);