Hi Michiel,

>I tried it, but I can't find the windowname. I tried the variable I use to put the createobject in and the name variable of the form. I also tried to retrieve the window name while running the Debugger but I cannot find it. Where do find the name for a window?

The window name is what's stored in the Name property, eg:

? WEXIST(Thisform.Name)

But you can also scan the Forms collection of _SCREEN:

  For Each oForm in _Screen.Forms
     If oForm.Name = "...."
        Exit
     Endif
  Endfor

Christof