It's mention your own MAPI.DLL the name in the exemple is MyMAPI.dll. What is that and how to implement it. Is this neede to make your email application to be able to send mail like Outlook Express and other email clinet applications? I have tryed to rename some of the dll's at this possition in the registry and if you do that your not able to send a file by right-click it in the explorer. You still have the emnu item in the right-click menu of a file item like "send to/mail recipent" but nothing is hppening. So there is something with that dll. Anything about this "MyMAPI.DLL" would help.