Extracting and Inputting Information Between two Applications

I pitched an idea to my boss that would streamline our work processes here. He asked me to come up with a solution. I used to program in visual studio a longggg time ago. I was hoping to get some sample code or even a full written code for what I need. 1.) An email will come in with patient information. Name/date of birth/address etc. 2.) This information needs to be extracted. 3.) The extracted information needs to be input into another windows application which generates a medical record number. 4.) The medical record number needs to be extracted and emailed back to the original sender. I'll even accept code that just provides me with a way to extract and input information between any two windows based applications. Just so I can see how it works.