🚀 go-pugleaf

Assuming you are using the same UnInstall Key then you can use:

    //
    //  We want UnInstall a previous version of APPLICATION
    //  so we will have to query the registry to find out if there is a version
	//	currently installed or not.  If installed then we obtain (at the same
	//	time and for no extra cost) the exact command that we must execute in
	//	order to UnInstall the previous version of the APPLICATION.
	//

    nRootKey = HKEY_LOCAL_MACHINE;

    if ( ! RegDBSetDefaultRoot( nRootKey )) then
        szKey  = "\\Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\" + @UNINST_KEY;
        szName = "UninstallString";
        nvType = REGDB_STRING;

        //
        //  If APPLICATION is already installed on this system
		//	then we want to ASK the USER if we should UnInstall it first...
        //

        if ( ! RegDBGetKeyValueEx( szKey, szName, nvType, szUninstallPath, nvSize )) then
			szMsg = Product_Name + @ASK_DEL_PREV_APP;

			nResult = AskYesNo( szMsg, YES );

			if ( nResult = YES ) then
				nvIndex = StrFind( szUninstallPath, "-f" );

				if ( nvIndex >= 0 ) then
					StrSub( szProgram, szUninstallPath, 0, nvIndex );
					StrSub( szCmdLine, szUninstallPath, nvIndex, StrLength( szUninstallPath ) - nvIndex );

					LaunchAppAndWait ( szProgram, szCmdLine, WAIT );
				endif;
			endif;
        endif;

        nRootKey = HKEY_CLASSES_ROOT;
        RegDBSetDefaultRoot( nRootKey );
    endif;

-- 
Best regards,
 _ __                      _    ,   _ _ _
' )  )     /         _/_  ' )  /   ' ) ) )
 /--' ____/___/> __  /     /--/     / / / __,_  __  o _   ______
/  \_(_) /_) (__/ (_<__   /  ( o   / ' (_(_) (_/ (_<_/_)_(_) / <_

Robert H. Morrison                      Tel:   +49 721 9628 167
Software Development, Basis Team        FAX:   +49 721 9628 261
Hitex-Systementwicklung GmbH            Email: RMorrison@hitex.de


Stefan Kr�ger <skrueger@usa.net> schrieb im Beitrag <358f5e62.0@news.installshield.com>...
> Tom,
> I suggest that you first decide which product you are using, and post your
> question only to the appropriate newsgroup, instead of spamming all the
> groups on the InstallShield news server.
> 
> Then there is a discription and an example for any InstallShield function in
> online help, that should get you started.
> 
> If you don't have the time to learn InstallShield, you can visit
> http://www.ibv-tools.de to find someone to create the setup for you.
> 
> Regards,
> 
> Stefan Krueger
> Software Engineer
> skrueger@usa.net
> 
> *** InstallSite - Free resources for setup developers
> *** http://www.ibv-tools.de
> 
> 
> TOM COLSON schrieb in Nachricht <358e8c1e.0@news.installshield.com>...
> >I have no need or time to discover the ins and outs of IS, but find my self
> >in the position where I have to use it. Thus, to get to the point, I need
> >someone to point me in the right direction concerning the regdbgetkeyex
> >function: I need to get a value from a particular key, ie an install
> >directory, then pass this value on to the deldir function. as you probably
> >guessed, i need the setup script to search for and delete any previous
> >installs of my package. I have figured out how to clean up the registry,
> but
> >this deleting the directory&files has me stumped, because the install dir
> >can vary from machine to machine, and i need this to be verybrain dead(like
> >my users). thank you very much, please em response to
> >thomas.colson@seer.com
> >thanx in advance
> >
> >
> 
> 
>