These are (I guess) the most basic printing instructions in C#, to let some printed paper coming out of a printer.
Start a new Forms application, drop a ComboBox, a Label and a Button on the form. Implement a form Load and a Button Click event and fill in the rest of the above code. I hope the comments in it are sufficient to understand the code. Feel free to ask,if not. If you find any errors in it, or if you have any remarks, please inform me as well.