Here is code snippt to launch menu application.
Code:
RApaLsSession rApaLsSession;
User::LeaveIfError(rApaLsSession.Connect());
CleanupClosePushL(rApaLsSession);
TApaAppInfo appInfo;
TInt retVal = rApaLsSession.GetAppInfo(appInfo, TUid::Uid(0x101f4cd2));
CApaCommandLine* cmdLine = CApaCommandLine::NewLC();
cmdLine->SetExecutableNameL(appInfo.iFullName);
cmdLine->SetCommandL(EApaCommandRun);
User::LeaveIfError( rApaLsSession.StartApp(*cmdLine));
CleanupStack::PopAndDestroy(cmdLine);
CleanupStack::PopAndDestroy(&rApaLsSession);