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I’ve got a toolbar button that has an attached popup menu. It has a mysterious delay of 1-2 seconds between clicking on a menu item and hitting a breakpoint in the menu item handler. I tracked it down to CExtBarButton::OnTrackPopup(). It looks like the delay is within that routine, between the call to pPopup->TrackPopupMenu() and getting the clicked command id. After that, things are fast.

Any ideas on what to look for or what I can try?

Thanks

We need more details about your project and the problem. Does the problem exist in Prof-UIS sample applications when you run them? Do you use custom painted menu items and your code loads some resources during the painting? Does your project implement any features that can eat CPU time?