How to run an application with only one instance on WinCE Platform ?

Question

Higuys. Here is my qustion how can i restrict an application to be run with only one instance on WinCE platform ? I wrote an application for PDAwith WinCE 5.0 installed in. And i want to make it run with only one instanceit meansif the application is running another instance of it should not be started again. I tried with some APIssuch asFindWindowExCreateMutexOpenMutex but there are no 'kernerl32.dll' and 'user32.dll' files on the platform.

Sam Hobbs · Answer

Have you looked at the articles in this web site especially the ones shown on the right side of the window selected for you? Note that there are three possible requirements; one is to do as you say not alllow additional instances. Another is to activate the first instance from additional instances before exiting. A third is to pass command-line parameters from additional instances.

Kevin Liao · Answer

Thanks Sam for your reply. Though  there are no 'kernel32.dll' and 'user32.dll' on WinCE we can still use 'coredll.dll' instead and here is the solution i take finallyas : static class Program { #region WinCE Platformrestrict multi-instance of applicationby kevin [DllImport(coredll.dll)] private static extern bool ShowWindow(System.IntPtr hWnd int cmdShow); [DllImport(coredll.dll)] private static extern bool SetForegroundWindow(System.IntPtr hWnd); [DllImport(coredll.dll)] public static extern System.IntPtr FindWindowW(string strclass string strname); public static Boolean IsApplicationRunning(string Caption) { System.IntPtr AppHandle = FindWindowW(null Caption); if (AppHandle.ToInt32() > 0) { return true; } return false; } public static void BringAppToTop(string Caption) { System.IntPtr AppHandle = FindWindowW(null Caption); if (AppHandle.ToInt32() > 0) { SetForegroundWindow(AppHandle); } } #endregion /// /// application entry point /// [MTAThread] static void Main() { if (Program.IsApplicationRunning(LogIn) == true) { MessageBox.Show(Application is running...); Program.BringAppToTop(LogIn); return; } else { Application.Run(new FLoginPDA()); } } }