Pass a string in PMP form

Hi to everyone and a happy new year.I am trying to pass a value in a "Textbox" from "OnSubmitSelection" event from PMPHadler but i have nothing .This is the code
 Dim ex As New FEditDox
        ex.TBEditBoxDepth.Text = "200"
        Return True
The "FEditBox " is a form
Can anyone tell me why i can't pass the value into the " TBEditBoxDepth.Text" control?
Regards Kostas

SolidworksApi/macros