Creating a loop on a DataGridView

[Jewtus]

I'm trying to work on a code base that is pretty chaotic and hard to follow. The code uses an DB2 connector, which I know how to use in autoit, but I really don't know how to use in C#. Can someone point me toward a tutorial or provide some suggestions on what I should be looking at/researching?

This is essentially what I need to do:

1) From the DataGrid, loop through each line

2) If the Y/N field is checked, perform different queries

3) Pass the results into another form to validate

4) Push the final results into a separate database (tracking database)