>>>>I created an application that does file exports and imports. These files have a specific extension. I want to be able to click on one of these data files and have the application launch and automatically import it. Can somebody point me in the right direction?
>>>
>>>Hi Mike,
>>>
>>>We use the filesystemwatcher class to poll a directory, when a file is placed there by the user, it automatically runs the code to import.
>>
>>I'm sorry, I must have not described my question correctly. Reading it again, I could have really simplified it.
>>
>>What I want to do is create an application that has data files of a specific extension, and when I open the data files it launches the application and loads the data. For example, when I click on a .doc file it launches Word and loads the document. I know I can make files of that extension open with my application, but I don't know how to load the data.
>
>You have to associate the program to handle that extension with the extension. Open any folder, go to tools/folder options/file types and register the action there. It should work. Thinking about it, you could probably write the registry keys yourself to register your file / type programatically.

How do I detect in my application that it was opened with a datafile, instead of opened without one?