QuickBasic Cafe Forum

Thank You Valerie for your responce.
What my task consists of is to take a string like this:
:0C01E0000702250041052105A4040008C9
Which is from a hex file used to program a microprocessor, and change some of the bytes, figure out the checksum and write the line back to the hex file. The checksum is ...

Does anyone know where QBasic routines for working with hexadecimal numbers can be found. I need to add, subtract, and do two's compliment operations on strings of hexadecimal bytes.

Thanks in advance for any help you might give.

Dave