Shoutbox

What do you mean "won't change back to the bigger"? Are you clicking the same button twice, or are you manually resizing the window before calling the function?

I'll guess that you need to change "if (PlusWnd.Height > 63)" to "if (PlusWnd.Height < 63)" (less than).  Can't be sure this would be your issue but it's the only thing making sense to me immediately.