>Hi,
> I would like to make my application to be launced when certain file extension is opened or activated .. how could I do so?
> Again, how could I make th Windows OS to launch my application once the certain file (*.myapp) when dbclicked?
>

Using the Windopws Explorer Select View/Folder Options. Select the File Types tab. This will display a list of known file types for the system. If you want to modify an existing association, select it and click the Edit button, which will allow you to change verbs defined for the file type, and add new ones.

If you want to create a new file type definition (an extension not then known to Windows, press the New Type button. This will allow you to define the type (file extension, a name for the type, default icon, and one or more verbs, of which one must be the default verb, invoked by double-clicking in Windows Explorer.

The same can be done programmatically; there is a hierarchy of registry keys created under HKEY_CLASSES_ROOT to accomplish the by the Windows Explorer. You can look at this using REGEDIT to explore the keys associated with your file type; if you've associated the extension "foo", then the entry in the registry would be under HKEY_CLASSES_ROOT\.foo

Be aware that this may point to another entry, in which case the additional entry and its sub-trees will be needed as well. You can use the FFC registry class, or one of the down;loadable registry classes from here on UT to make the necessary changes.

No, I do not have source code to give you to do this.
>
>Thank you