Hi Barbara! Thank for answer, the problem was that I didn't add the parameters to the MouseMove event as it required by VFP Thank to all, who answered, the problem is gone ;) >>Can anybody give me an advice about this issue? >>I'm going to crazy ;( > >Vlad, please don't go crazy ;-) > >Here's a possible idea: Have you checked in the property sheet or debugger >to be certain that your "thisform.cntMLTooltip.Timer1" is the exact name of >the control? If you have more than one instanciated, the names may be >different - perhaps "thisform.cntMLTooltip1.Timer1" or something similar?