I'm trying to use a Type 19 custom action in a Basic MSI project to block installation if a previous version hasn't been installed. It's a multi-language install, so I need my error message in 7 languages.
In the string table I can see IDS_ERROR_71 is close to what I want. But how do I get that to work in the error message field of the action? I've tried it by itself (which just prints IDS_ERROR_71 on the message box) and in square brackets (which just displays "1:")
I knew I was missing something obvious. You can't directly reference the string table from the custom action settings, but you can access localised properties. All I needed to do was create a new localised property containing {IDS_ERROR_71} and reference that property in square brackets from the custom action screen.
