from KEIL to hex file

Hi everybody,

Maybe my problem is considered as a trivial problem for others and nobody will answer me...
But for me as a beginner I feel that this problem is the life problem
So please help my life...

I have the kit C515C, Keil uVision2 and Flash tools 98
Flash tools 98 is working and can connect with the Kit but it needs a hex file to download it on the microcontroller.

I wrote a simple program on the Keil 'myprog.C',
Am not able to make a 'myprog.hex'

I went to tools menu > customize tools menu
But I don't know what I have to write their.

Do I have a program missing file or I should write specific command in the 'Command' or in the 'Arguments' space??
Please answer me, even if your answer is wrong it may lead me to a result.

Thnaks