Hi!

I did had the same problem once. It was related to some VFP code that runs as soon as mouse clicks on listbox. Removing or replacing some commands in code is fixed it, but I do not remember where is that code and what are the problematic commands. Try to remove bits until behavior disappear.

Try also to change the row source type.

HTH.

>have an intermittent problem with a regular listbox. sometimes
>when user tries to make a selection from the listbox, it appears
>that the mousedown event is recognized (because it hightlites the
>listitem) , but the mouseup event seems to be lost (because
>the when the mouse button is released, the highlite moves with
>the mouse, even when the mouse is not over the listbox). sometimes
>after maybe 30 or 40 seconds, the currently highlited listitem
>will be selected and the highlite will quit following the mouse
>movement.
>
>this is VFP6SP5 on WIN95. i don't have any code in any listbox
>event ... i just retrieve the value later, when an OK button is
>clicked. this is happening with all 4 computers on which the
>app is installed.