Delphi Code Expertise (SetFocus issue)

We have an application written in Delphi 7. Part of this application's functionality is to switch back and forth between it and Microsoft Excel. We are having a problem of regaining focus when switching back to our application. The program switches to Excel properly, but when switching back, our program is not regaining focus. Our programmer needs sample code to ensure that we regain focus everytime. The code must work on Windows XP and all flavors of Vista. ## Deliverables We need a small testing application that will demonstrate your coding solution. We will need source code for your (correct) solution.