That is curious. However, a quick test to send WM_GETFONT shows that the window is responding. What happens if you send a mouse click to the window's button? Or you could also try to send a WM_SETFONT to the window to see if it does anything. HPS HwndSpy - GUI developer's aid to visually locate and inspect windows. For the month of August only, use coupon code CP-81239 for 30% off.