Question

I m trying to port an NSIS installer to WiX. Every time the installer runs it sets a registry key to a new GUID value, so that when my app runs it can see if it s first run after an install. On first run the app sets another registry key to the GUID value from the installer. As long as the two keys match then I know the installer hasn t been run.

Here s the NSIS code:

#Write InstallGUID
Call CreateGUID
Pop $0
WriteRegStr HKLM "${REGKEY}" InstallGUID $0

and

Function CreateGUID
  System::Call  ole32::CoCreateGuid(g .s) 
FunctionEnd

I ve got a fairly complete WiX installer ready at this point, but I can t figure out how to replicate this functionality. Is there something in WiX to generate GUIDs at install time, or do I need to write a custom event? If I could avoid writing a little dll that would be best.

Answer 1

If you don t find a better solution you could put that code into an NSIS script by itself and make it a silent install so that you can silently run the NSIS script from the Wix+MSI installer.

I would be mindful to do appropriate error catching in the NSIS code and return/set error code to be returned back to Wix so that any registry related failures/errors can be communicated to the Wix installer.

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