Calling Uninstallation while installing

watzr · 25th September 2009, 07:37

Hi,

I wanna uninstall the application at the time of installation if it's already been installed. Since Uninstall section or functions cannot be called within other functions I need to know the correct way of doing this. There were few related topics in this forum. But I couldn't apply them.

watzr · 25th September 2009, 07:50

I tried with "Exec <Path\Uninstaller.exe" in pre_instfiles function. Then it worked. Is this method correct?

MSG · 25th September 2009, 08:37

This method is just fine. You can also just create a normal function in your NEWER installer, that deletes all the files and regkeys etc. If your older uninstaller is trustworthy, you can simply use that. But you'll probably want to use ExecWait, not Exec.

watzr · 25th September 2009, 10:18

Thanx...

25th September 2009, 07:37	#1
watzr Junior Member Join Date: Sep 2009 Posts: 39	Calling Uninstallation while installing Hi, I wanna uninstall the application at the time of installation if it's already been installed. Since Uninstall section or functions cannot be called within other functions I need to know the correct way of doing this. There were few related topics in this forum. But I couldn't apply them.

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25th September 2009, 07:50	#2
watzr Junior Member Join Date: Sep 2009 Posts: 39	I tried with "Exec <Path\Uninstaller.exe" in pre_instfiles function. Then it worked. Is this method correct?

25th September 2009, 08:37	#3
MSG Major Dude Join Date: Oct 2006 Posts: 1,841	This method is just fine. You can also just create a normal function in your NEWER installer, that deletes all the files and regkeys etc. If your older uninstaller is trustworthy, you can simply use that. But you'll probably want to use ExecWait, not Exec.

25th September 2009, 10:18	#4
watzr Junior Member Join Date: Sep 2009 Posts: 39	Thanx...