To prompt for a location like most windows programs, use the Common Dialog Box. In design mode on the form, click the icon in your toolbox that is a hammer and a wrench and says "More Controls." Go down to the Microsoft Common Dialog Control 6.0.
I only have a partial install on my system, so I can't use it, but I believe the code should resemble the following:
.Filter = "Adobe PDF Files (*.pdf)|*.pdf|"
.FilterIndex = 1
.CancelError = True
.InitDir = App.Path
.FileName = strFileName 'a default filename, if desired
after the user presses "Save," the selected path & filename can be stored in strTemp (or any other variable) by: