"Invisible" combobox

I’m working with some customized controls, so this might just be a problem with my code, but I’m wondering if anyone has seen anything similar to a bug I just had.

The issue is with a ComboBox (with a custom paint() method) on my main window that when clicked, no longer displays the popup menu. I’m still able to click around and make selections as if the popup was invisible. I’m wondering if it was somehow just being drawn behind my main window, or not drawn at all. I’ve noticed this occasionally on a few Windows XP machines, and for some reason restarting the machine seemed to fix the problem each time.

Has anyone seen anything similar when working with custom controls or ComboBoxes?

No, haven’t seen anything like that. You’ve probably just overridden a method that the base class was using.