How can I set an icon for an asscociated file using WiX?

Question

My application install file is being generated using WiX. In the WiX configuration I am associating a file type that works with the application. How can I associate an icon

Answer 1

Please note that Dracos answer is not suffiecent for a complete icon/file association.

The following code:

This is how I did it. I declared:

Is only registering a file/icon association for the dialouges created by the application which is installed by the given wix-project. To get an icon that is shown overall for all the dialogues, desktop etc. in windows you also need to register your icon for a specific filetype (extension) in regedit.