I have to maintain a number of minor legacy apps and most of them have no or minimal documentation. There are a couple of these which were written either in VB5 or 6, but I can't tell which. There doesn't seem to be big difference in the appearance of the source code, and I can load either one using VB6, and even run them in the IDE, but I have the feeling that the older of the two is VB5. Is there a way to tell by code inspection which one a project was created in? Or some other way.
The .VBP file for a VB6 project will contain a line like this:
Retained=0
VB5 project files do not contain this line. You can load VB6 project files in VB5, but you get a warning about the invalid "Retained" key.