KenX,

Thanks for the tip - much appreciated. But is there a better way than this? If I understand what you're saying, your idea is a way of codding people, rather than protecting my app.

For example, if you double click a page.htm file, it opens in a browser. If you change the extension to, say, .hm, it doesn't open - it doesn't know what app to open it with.

But if you open the browser .exe, choose open file, you will be able to open the .hm extension that way. Is there any way I can have it so my file can ONLY be opened through my App? What's this about resource files? Compressing?

Thanks again!