[SOLVED] Event suddenly executes more than once

[BubikolRamios]

Suddenly this event executes twice in roll. Screen is from second execution (note that showmessage already fails), first execution executes as it was normal.
Bunch of controls on form, all calling this event onMouseWheelDown. Got similar event onMouseWheelUp, where instead -1 there is +1. That works as always, with no problem.

Any clue ?

[BubikolRamios]

Ok found it, have no idea how I glued event to TPanel, must have been done by lazarus (I was adding, removing controls and their events to TPanel) (-:
Sometimes lazarus editor does weird things.

Code: Pascal  [Select][+][-]

1. showmessage(sender.ClassType.ClassName);        
2.