My guess is that this is related to the fact that VFP uses F10 to activate the menu. I'm assuming your trapping for the keys in the keypress event of your form(s). The only way I've found around this is to redefine the F10 key with an On Key Label. It's not elegant, but it works:

on key label f10 keyboard '{CTRL+SHIFT+F10}'

>Does anyone have any insight into using function keys in a form? We've been able to get most of the function keys to work OK, but F10 doesn't seem to work at all. It looks like FoxPro doesn't recognize the fact that it's been pressed at all.
>
> Just a bit of background - we're porting an app from Clipper to VFP. Most of the screens have function key shortcuts, and we're trying to duplicate this functionality in our VFP application. The rest of the function keys are OK, just not F10.