Sends a message that has been created with MapiCreateMessage. Before you send a message you can use the MapiSetMessage functions to set additional recipients or add attachments.
Mapi.bdh
MapiSendMessageEx(   in   hSession    : number;
                     in   hMessage    : number); boolean| Parameter | Description | 
|---|---|
| hSession | Valid MAPI Session Handle | 
| hMessage | Valid MAPI Message Handle | 
See MAPI Sample