use office automation interface can get mail from outlook.
Q220600 HOWTO: Automate Outlook Using Visual C++/MFC
http://support.microsoft.com/support/kb/articles/q220/6/00.asp
Q196776 FAQ: Office Automation Using Visual C++
http://support.microsoft.com/support/kb/articles/q196/7/76.asp
Q260574 HOWTO: Work with Linked Contacts of Outlook Items – VC
http://support.microsoft.com/support/kb/articles/q260/5/74.asp
Q241287 HOWTO: Get Currently Selected Item in Outlook Folder from VC++
http://support.microsoft.com/support/kb/articles/q241/2/87.asp
Q199870 HOWTO: Send a Message by Outlook Object Model with VC++
http://support.microsoft.com/support/kb/articles/q199/8/70.asp