AppMutex with Inno Setup: Wait few seconds before prompt - inno-setup

Question

Using Inno Setup together with an AppMutex works fine - when the setup is started and the mutex still exits, the user is prompted to close this application.
But following question:
Is there a way to tell Inno Setup to wait 2-3 seconds if the program closes itself before showing the user this prompt?
The reason is that I'm running the Inno Setup from the program itself for auto-update purpose. Directly after the setup file is executed the program closes itself, but obviously that takes too long (at least on some systems). So Inno Setup shows this - in this case - useless dialog to the user although the program is closing itself already.
Therefore I would like to accomplish that Inno Setup waits 2-3 seconds and only if the mutex still exists after that time it should show the prompt to the user.
Is there a way to accomplish this?

Answer 1

With such requirement, you cannot use the built-in AppMutex directive.
You have to implement the mutex check yourself using CheckForMutexes function in a loop, as you have been suggested to in your previous question:
[Code]
const
MutexName = 'MutexName';
function InitializeSetup: Boolean;
var
WaitInterval: Integer;
Wait: Integer;
begin
Wait := 3000;
WaitInterval := 250;
while (Wait > 0) and CheckForMutexes(MutexName) do
begin
Log('Application is still running, waiting');
Sleep(WaitInterval);
Wait := Wait - WaitInterval;
end;
while CheckForMutexes(MutexName) do
begin
if MsgBox(
FmtMessage(SetupMessage(msgSetupAppRunningError), ['MyApplication']),
mbError, MB_OKCANCEL) <> IDOK then
begin
Abort;
end;
end;
Result := True;
end;