Get a feature from existing program and make it standalone in visual basic

I need to get a feature from 2 existing programs, either one works, you can either reverse engineering or start from scratch, I have both programs and I have pieces of code from one of them after trying to reverse it myself but I got to the point where I'm completely stuck. The end result has to work exactly like any of the 2 programs, must be written in visual basic and be easy to implement on other projects. The feature is basically a brute force finder example: HEX: A123456789 = 987654 HEX: A987654321 = 987654 HEX: A000222000 = 987654 let's say those 3 hex values can be converted to other and they all have the same return, that can be easily done, the feature in those programs allow me to find 987654 in all the HEX values that can be converted to that string in a range. More info and applications can be given upon request. I'm doing this to make my job easier and faster so I'm not looking into profiting from this, My budget is not so big so if this will cost too much I would preffer to keep doing my job hard and slower. Thanks.