[Help me!]How to develope a mail program on my own SDK?(MAPI, msgstore.lib or others)

I create a SDK through platform builder and I want to develope a mail programe on this SDK.

First ,I interest in MAPI.But I didn't success! Because I can't initiallize it.Maybe MAPI only used on windows mobiles SDK I don't know.

Then ,I try another method to implement it. It's msgstore.lib. When I custom my SDK, i add the SYSGEN_AS_MAIL module in platform builder.In my program I add the msgstore.h and msgstore.lib. I can create the mail in the folder interface which have been provided and use MailPut() function to send the mail .But I know it is not really send the mail,just put the mail into the outbox folder. How can I really send the mail and How can i test it on the emulator

Do you have any other method to implement send/recevie mail on own SDK Please share it to me,Thank you very much!