HEX file Name

But there is the option to run an arbitrary program after a build - so you could use that to re-name the hex file...

But there is the option to run an arbitrary program after a build - so you could use that to re-name the hex file...

I agree for that,
But I have to give output file(Executable file) name based on the Macors that i have defined during compilation

is is possible?

The hex file name is defined in the Project properties - so define your macro(s) based on that.

You can use the Key Sequences to extract this information: http://www.keil.com/support/man/docs/uv3/uv3_ut_keysequence.htm

In our code we need to chnage the HEX file name based on the Macro, so is it possible to set the HEX file name based on the Macro condition

No.