>Hi
>
>I apply your solution, but can I don't close the called form and pass back the param. to calling form ?
>
>I want user to press a OK button then the param. pass back to calling form to do record searching, but the
>called form still active on screen for user to select other customer code.
>
>How can I switch back to calling form without unload the called form ?
>
>Please advise
>
>Thanks.
>Derek

In the Ok button you can do
thisform.Hide()

The focus and control should switch to the calling form at this point and in that form you can access oParam.Property