<A href="http://filext.com/">FILExt Home Page</a>

<A href="http://www.ace.net.nz/tech/TechFileFormat.html">Almost Every file format in the world!</a>

<A href="http://www.file-ext.com/">File Extensions Windows/OS2/ Apple/UNIX</a>

But what the heck do you want to look at in what is an:
OLE Custom Control, 32 bit (Visual Basic or C++) ActiveX control ???