passing variables

I thought I posted this but apparently didn't take I have a win form app I am building. Initially I build a variable string from following code and need to pass it to next function which sends to dll and on to server. My problem is I create the string its there but I lose it before I can pass...

This is my first Windows app to create since VB6. I've been in the world of ASP and ASP.NET for many years. However, now I have been asked to create a simple app that needs to be windows based. So far, so good - except when I pass a variable from a datagrid from one form to the next I see a bit...