Uninstaller For Vb Application

i recently wrote an application in vb.net to print over an a4 paper, the app consists of a basic windows form with a couple of text fields who's values will be printed over specific location on the a4 paper, some of the extra features i added were the ability to save the text in the fields as .pf file (.pf is my own custom made extension name to make this custom extension i had to create 3 keys in the registry: [Code]

This indicates that whenever an application with an extension .pf is double clicked open it with my application and the "%1" means pass in the name of the file as a command line argument to my application (later in my application i added code to deal with command line parameter i.e simply read the content of the file and fill in my text fields with it) also i added a 3rd registry key which describes the location of the icon for this extension: QuoteHKEY_CLASSES_ROOT\PrinterForm\DefaultIcon with a string value of the path to the icon file using the following code: [Code] now i want to delete this keys when the user uninstalls my app. How can i achieve this goal? is it possible to write uninstall code in vb.net?