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copied!<p>Check these</p> <p><a href="http://www.jrsoftware.org/iskb.php?mutexsessions" rel="noreferrer">Inno Setup: Detect instances running in any user session with AppMutex</a></p> <p><a href="http://www.vincenzo.net/isxkb/index.php?title=Application_considerations#Application_is_running" rel="noreferrer">Inno Setup: Is application running?</a></p> <p><a href="http://www.vincenzo.net/isxkb/index.php?title=Detect_if_an_application_is_running" rel="noreferrer">Inno Setup: Detect if an application is running</a></p> <p>There are several ways. If your program defines a mutex use</p> <pre><code>[Setup] AppMutex=MyMutexName </code></pre> <p>or for a specified mutex in the <code>Code</code> section</p> <pre><code>function CheckForMutexes (Mutexes: String): Boolean; </code></pre> <p>You could also use</p> <pre><code>function FindWindowByClassName (const ClassName: String): Longint; </code></pre> <p>to get the window handle by class name and send it messages.</p> <p>Or get it by the name</p> <pre><code>function FindWindowByWindowName (const WindowName: String): Longint; </code></pre> <p>Or you use one of several DLL files for this specific use case</p> <ul> <li><a href="http://www.vincenzo.net/isxkb/index.php?title=PSVince" rel="noreferrer">PSVince</a></li> <li><a href="http://nsis.sourceforge.net/FindProcDLL_plug-in" rel="noreferrer">FindProcDLL</a></li> </ul> <p>Or do it yourself after reading</p> <p><a href="http://support.microsoft.com/kb/178893/en-us" rel="noreferrer">How To Terminate an Application "Cleanly" in Win32</a></p> <p><a href="http://support.microsoft.com/kb/175030/de" rel="noreferrer">How To Enumerate Applications Using Win32 APIs</a> (this one links to the german version as for some reason I can't find the english version of KB175030</p> <p>or try the google translated version of the KB175030-DE</p> <p><a href="http://translate.google.com/translate?js=y&prev=_t&hl=de&ie=UTF-8&u=http%3A%2F%2Fsupport.microsoft.com%2Fkb%2F175030%2Fde&sl=de&tl=en&history_state0=&swap=1" rel="noreferrer">KB175030 DE -> EN</a></p>

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