How to use WiX to register a dll to a COM post install

Question

I want to use regasm.exe to register a .net dll as a COM object. I am running into a problem which is causing the intstaller to not work. I believe it is because the file I want to register has not made it to the installed directory by the time I want to run the command. But there error log does not say enough about the install error for me to know. Any ideas, how to make sure the file is moved to "program files" before I run the custom command?

Here is what I am using:

  <InstallExecuteSequence>
    <Custom Action='comReg' After='InstallFinalize'>NOT REMOVE</Custom>
    <Custom Action='comUnreg' Before='RemoveFiles'>REMOVE</Custom> 
  </InstallExecuteSequence>

  <CustomAction Id='comReg' Directory='INSTALLDIR' 
 ExeCommand='"[WindowsFolder]Microsoft.NET\Framework\v2.0.50727\regasm.exe" "[INSTALLDIR]my.dll"' Return='check' />

  <CustomAction Id='comUnreg' Directory='INSTALLDIR' ExeCommand='"[WindowsFolder]Microsoft.NET\Framework\v2.0.50727\regasm.exe" /u "[INSTALLDIR]my.dll"' Return='check' />

Answer 1

Why do you want to do that? You'll lose all the rollback that capturing that registration in the appropriate MSI tables would provide. Plus, with that scheduling, you're going to have problems with elevation.

I highly recommend using heat.exe to capture the regasm of your assembly and using the declarative approach instead.