Flash image download code in C++ ?

Is there any sample codes in C/C++ that can download the flash image into RCM3100 module with Rabbit programming cable via RS232 comms?

I would like to add in flash download feature in my test program without using RFU (Rabbit Field Utility)

Please can some one here share some ideas on it?

Many thanks.

I use the serial download manager from SH Designs. Can attest that it works well.
Unfortunately it is not free.

Noted with thanks.

Just realized there is a RFU source code in Borland C++ selling at Rabbit store.