Hi, my program creates a number of files that I would like to register as a known file type with the windows OS. Rather than manually doing this (ie via the explorer window) I would like to be able to do this in software, say when the user first runs the program. These files have the suffix ".ntm"

Then, once registered, when the user double clicks one of the ".ntm" files my application opens and I display the contents of that file somewhere on one of the forms.

There are 2 issues here and help with either (or both preferably!) will be gratefully received,

Can anyone help?

Thanks in advance

Sean Newell