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.NET Forum / .NET Framework / Compact Framework / September 2007Detecting activation
If the user taps an icon while the application is already running, CE (or CF?) activates the already-running instance. Has anyone found a way to detect that this has happened? I need my already-running application to do some extra UI in this case. All I'm seeing is a call to OnActivated in my top window. TIA! -- David Your WinMain method detects the presence of the application and either starts a new instance or activates the current instance. You could place additional code in the application activation method to send a message to your application that this event occured. The IDE creates a method called InitInstance in a C++ project. You could place your code in the section where SetForegroundWindow is called. In C# you have to determine if you app is running and then activate it or maximize it yourself. You would do this in the Main method. Regards, Rick D. Contractor > If the user taps an icon while the application is already running, CE (or > CF?) activates the already-running instance. [quoted text clipped - 7 lines] > -- > David > In C# you have to determine if you app > is running and then activate it or maximize it yourself. You would do this > in the Main method. I'm not seeing this. When I attempt to launch my application a second time, the already-running instance is brought to the foreground. No calls are made to Main. I understand that if you re-launch an application before the first instance is up and running, you can get a second instance (which means you have to supply mutex code); however, that's not the case here. The OS or CF seems to be bringing the already-running instance to the foreground. -- David > I'm not seeing this. When I attempt to launch my application a second > time, > the already-running instance is brought to the foreground. No calls are > made > to Main. That is correct. I consider it a major problem with the CF implementation in WM (CE doesn't have this problem), but that's just me. To get it to behave, you have to rename the class of the parked form that the CF is looking for and handle the second instance manually. Alex Feinman posted about how to do this way back in CF 1.0 days. I believe the class name changed in CF 2.0, but the general idea is the same. > I understand that if you re-launch an application before the first > instance > is up and running, you can get a second instance (which means you have to > supply mutex code); however, that's not the case here. The OS or CF seems > to > be bringing the already-running instance to the foreground. It's the CF - not the OS. And the fact that you can still get a second instance is proof that the idea of what they were trying to achieve is broken.  SignatureChris Tacke, Embedded MVP OpenNETCF Consulting Managed Code in an Embedded World www.OpenNETCF.com Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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