Uninstall fails because program is running. How do I make Inno Setup check for running process prior to attempting delete?

Question

Inno Setup fails to remove components during uninstall cause my program is still running and the executable cannot be deleted. How do I have it check to see if it is running before allowing uninstall to proceed?

Answer 1

Check these

Inno Setup: Detect instances running in any user session with AppMutex

Inno Setup: Is application running?

Inno Setup: Detect if an application is running

There are several ways. If your program defines a mutex use

[Setup]
AppMutex=MyMutexName

or for a specified mutex in the Code section

function CheckForMutexes (Mutexes: String): Boolean;

You could also use

function FindWindowByClassName (const ClassName: String): Longint;

to get the window handle by class name and send it messages.

Or get it by the name

function FindWindowByWindowName (const WindowName: String): Longint;

Or you use one of several DLL files for this specific use case

• PSVince
• FindProcDLL

Or do it yourself after reading

How To Terminate an Application "Cleanly" in Win32

How To Enumerate Applications Using Win32 APIs (this one links to the german version as for some reason I can't find the english version of KB175030

or try the google translated version of the KB175030-DE

KB175030 DE -> EN