Lingering message when dialogue opens

I ask my users to select an object, then the dialogue opens. Problem is, the message remains on the screen. Sometimes the message text isn't displayed, only the grey box. Is there something I can do to ensure the display is clean before open the dialogue?
See the attached image.

Strange ...

Is your Graphic Card and the Driver up to date?
Have you tried the command "_redraw"?

Hi,

I'm sure there was something.
When I want to make sure that the latest modifications are displayed on screen before the form comes up again, then I call (vla-update (vlax-get-acad-object)). It also updates the drawing database without regen.

Hope that could help in this case, too.
Fred

Thanks, Fred. I'll try (vla-update (vlax-get-acad-object)).