Double-click a file to open app

How can I make my app process (or just get the name of) a file that was double-clicked on to start my app? The extension is already linked to the app but when I double click the file it just starts the app, now I want to read the file that was clicked on.

Thanks,
Steve

It's represented by Command.

Code:

---

Private Sub Form_Load()
    Open Command For Input As #1
    Text1 = Input(LOF(1), 1)
    Close #1
End Sub

---

Basically, you can treat Command as if it was a filename.

Would Command contain a full path or just the name of the file, also would the file extension be in that?