App.PrevInstance is an extremely useful statement which allows a running application to determine if another instance of the app is currently executing.  Unfortunately, app.previnstance is not supported in VBCE 6.0.  You can simulate it though with a few API calls.  

Special thanks to Sean Calvert for contributing this code.  Sean is currently responsible for the development of PC and CE Windows based commissioning and monitoring software for Emergency Lighting and Fire Detection panels using Visual C++ and Visual Basic.

In 1999, Sean Calvert set-up EasiComm Solutions Ltd with 2 colleagues. EasiComm Solutions Ltd provides IT services such as MTMS Support, Systems Integration, and bespoke programming. EasiComm Solutions Ltd is currently negotiating terms to provide on-going support for their current employer's software product range.

Be sure to check out Method 1