Hey, Eric,

There are several different ways to do this - the simplest being as follows:

Create a property or public variable in the form (let's say it's called TotalAmount)

MyForm oForm = new MyForm();
oForm.ShowDialog();
if(oForm.TotalAmount > 5000)
    // do something

Again, just a very simple example. Let me know if that doesn't cover it.

Kevin