fetch any e email account name configured in outlook

I need to fetch any e email account name configured in outlook and invoke
the outlook with a file attatched. Like in following code I have hardcoded
the account name("eb") but I need to fetch it programmatically.
TCHAR cmd[]=L"-service \"eb\" -to \"\" -subject \"Photos\"";
CreateProcess(_T("tmail.exe"), cmd, NULL, NULL, FALSE, NULL, NULL, NULL,
NULL, NULL);

Any help will be highly appreciated.
Thanks & Regards
Shoeb