How can I increment a macro value?

[David Hoffer]

I have a project macro (BUILD_VER) that I want to increment after every build. How can I do this?

I am trying to use the Macro action where I set its value. If I set its value to %BUILD_VER% +1 it changes the value to be "5 + 1". How can I make it evaluate the math first?

-dh