How to get the return value of the Open File Dialog in a CutomAction

[mgemme]

I need help implementing a Open File control within a dialog in my Initial Install sequence. The only way that i found is to call a custom Action in which a call a VBScript containing the code to call the open file dialog. The way i did this is to hook up an DoAction event on a PushButton. The open File dialog is showing up but I don't know how to retrieve the returning string (File name and path), Any ideas ???

Thanks