UVision and running something prior to compilation start

I've attempted some searching for this but I've thus far been unsuccessful. I am attempting to add in a build # (already have version #'s) too my code. However I can't see any way to execute a batch...
UVision and running something prior to compilation start

I've attempted some searching for this but I've thus far been unsuccessful. I am attempting to add in a build # (already have version #'s) too my code. However I can't see any way to execute a batch...
Something wrong

double calc( int angel) { return sin(2*pi*(5/48000)*l); } Why do the function always returns zero?
Something wrong

double calc( int angel) { return sin(2*pi*(5/48000)*l); } Why do the function always returns zero?
something about preprocessor

when i use preprocessor #if 0 ... #endif to cross out a bunch of sentences, then after building the target. I noticed the "data" memory usage increased, why? There is no error in the result.