>Is there any difference between these two functions - Dragan's anticipated comments aside - or advantage of one over the other?
>

>IF VARTYPE( THISFORM.tmrCheckMousePosition ) = 'O'
>

>

>IF PEMSTATUS(THISFORM.tmrCheckMousePosition,'O',3)
>

The second syntax is incorrect.

PEMSTATUS()

If you need to check for a property or a method, use pemstatus. Otherwise you may check with vartype. It all depends on what you're trying to do.