Negating session variable

[trilogycomms]

I have a session variable that reads a check box from the screen. I use this value to an ini file, which sets it as True if checked. I actually want to write the negated value, in other words, False if True.

In the action properties for After installation how can I negate %myvalue% in the Value data edit box? I tried ! or not, but they get written verbatim. I could not find anything about this in the userguide.pdf.

Also, is there a way to read a check box value from the screen as a 0/1 instead of False/True?

Thank, Tom.

[trilogycomms]

Got it, in the after installing I added an assign value variable evaluating the expression
%myvalue% = 0

Tom.