AFAIK the msi engine does use a special host. So a vbs which runs with 
wscript may be invalid with the msi scripting host.

I once created a vbs custom action. If I remeber correctly the msi host 
does not support msgbox function.

Michael

Am 17.06.2011 00:06, schrieb Roy Clemmons:
> I hope this didn't post twice. I didn't see it in the forum, but, forgive me
> if this is a duplicate.
>
> All I'm trying to do is execute an external vbscript using a custom action.
> It doesn't seem to work. A search on the forum reveals I'm not the only one
> experiencing this problem.  Someone providing a solution would provide a
> great example for those of us with the problem and for future reference.
>
> The two files are included below. Can anyone get this to work?
>
> Product.wxs
> <?xml version="1.0" encoding="UTF-8"?>
> <Wix xmlns="http://schemas.microsoft.com/wix/2006/wi";>
>    <Product
>         Id="B55596A8-93E3-47EB-84C4-D7FE07D0CAF4"
>         Name="Test"
>         Language="1033"
>         Version="2.0.0.0"
>         Manufacturer="Test Company"
>         UpgradeCode="B414C827-8D81-4B4A-B3B6-338C06DE3A11">
>
>      <Package InstallerVersion="301" Compressed="yes" />
>
>      <UIRef Id="WixUI_Minimal" />
>
>      <Binary Id="myScriptVBS" SourceFile="myScript.vbs" />
>      <CustomAction Id="myScript_CA" BinaryKey="myScriptVBS"
> VBScriptCall="myFunction"></CustomAction>
>
>      <InstallUISequence>
>        <Custom Action="myScript_CA"  After="LaunchConditions" />
>      </InstallUISequence>
>    </Product>
> </Wix>
>
> myScript.vbs
> Sub myFunction()
>         msgbox "Hello, World!"
> End Sub
>
> Thanks in advance.
>
>
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