Thanks Sascha.

Yes, I'm looking at it and having this piece of code which doesn't work:
<Component Id="Component_Gacutil_EXE" Guid="...">
    <File Id="GacutilExe" Source="gacutil.exe" KeyPath="yes" Checksum="yes"/>
</Component>
<Component Id="Component_DotNet_CLR" Guid="...">
    <File Source="CLR.dll" KeyPath="yes" Checksum="yes"/>
</Component>
...
<CustomAction Id="RunGacutilExeOnInstall"
    FileKey="GacutilExe"
    ExeCommand='/i "[INSTALLLOCATION]CLR.dll"'
    Return="asyncWait" />
<CustomAction Id="RunGacutilExeOnUninstall"
    FileKey="GacutilExe"
    ExeCommand='/u "[INSTALLLOCATION]CLR.dll"'
    Return="asyncWait" />
      
<InstallExecuteSequence>
    <Custom Action="RunGacutilExeOnInstall" After="InstallFiles">NOT 
Installed</Custom>
    <Custom Action="RunGacutilExeOnUninstall" 
After="InstallInitialize">Installed</Custom>
</InstallExecuteSequence>
...
<ComponentRef Id="Component_DotNet_CLR" />
<ComponentRef Id="Component_Gacutil_EXE" />

Basically, a few problems:
1. During installation, nothing happened.
2. During uninstall, I'd like to run "gacutil.exe /u CLR.dll". However, since 
it never got a chance to run in installation, I guess it never got run in 
uninstall. Does the code look alright or not?

Could any of you please point out the errors? I really appreciate it.

Thanks a lot,
/Brian




________________________________
From: Sascha Beaumont <[email protected]>
To: General discussion for Windows Installer XML toolset. 
<[email protected]>
Sent: Thursday, May 28, 2009 10:07:49 PM
Subject: Re: [WiX-users] WiX 3.0: How to run another program before launching 
the main application

Check out the documentation, specifically "ShellExecute CustomAction"
and "How To: Run the Installed Application After Setup" in WiX.chm

On Sat, May 23, 2009 at 10:13 AM, little.forest <[email protected]> wrote:
> We are using WiX version 3.0.4805.0.
>
> How to run another program before launching the main application?
> We have a program called preutil.exe. We need to run it with some arguments 
> like this "preutil.exe /i /t /s". How to do it?
> Thanks a lot,
> /Brian
>
>
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