>We have some clients that are using our application written in VFP 9 SP2.
>
>They were telling us that a mouse click wouldn't open the menu pad but they could use the Alt+Hotkey to open the pads. After connecting with their workstations we found that if you hold the mouse button down, the menu pad will finally open. Has anyone else seen this? At first I thought it might be a video driver problem but their workstations are from different manufacturers with different video cards.

Check that the mouse driver/software package is exactly correct for the mouse hardware. I've seen instances of cheap, non-MS or Logitech mice being used, but still using Microsoft or Logitech drivers and/or control panel applets. Sometimes these cheap mice do properly emulate MS or Logitech, but often they don't. Or, the cheap mouse comes with its own software, which is buggy.

If a cheap/generic mouse is being used, probably the quickest thing to try is to borrow or buy a genuine MS or Logitech unit, uninstall any 3rd party drivers/software package for the old mouse, install the correct MS or Logitech drivers as required, and retest.