I'm facing with problem working through MAPI. When I obtain list of messages from any folder I get empty list. I do the following steps: 
 
1. Open MAPI session
2. Invoke OpenMsgStore
3. Get folder identifier using PR_CE_IPM_DRAFTS_ENTRYID
4. Do OpenEntry 
5. Obtain message list using GetContentsTable 
6. And at last do the following:
status = pFolderItems->QueryRows (1, 0, &pRowSetMsg);
if ((status != S_OK) || (pRowSetMsg == NULL) || (pRowSetMsg->cRows == 0))
{
    // each time we reach this place because pRowSetMsg->cRows equals to 0
    // but there's at least one message in the folder (I put it by myself)
} 
Each operation from above returns S_OK. 
This is code snippet:

   // Log onto MAPI
    status = MAPILogonEx(0, NULL, NULL, 0, static_cast<LPMAPISESSION *>(&pSession));
    HALT_ON_ERROR(status); // HALT_ON_ERROR will goto Error if FAILED(status)
    // Get the table of accounts
    status= pSession->GetMsgStoresTable(0, &ptbl);
    HALT_ON_ERROR(status);
    // set the columns of the table we will query
    status= ptbl->SetColumns ((SPropTagArray *) &spta, 0);
    HALT_ON_ERROR(status);
    while (TRUE) {
        // Free the previous row
        FreeProws (prowset);
        prowset = NULL;
        // get item
        status = ptbl->QueryRows (1, 0, &prowset);
        if ((status != S_OK) || (prowset == NULL) || (prowset->cRows == 0))
        {
            break;
        }
        ASSERT (prowset->aRow[0].cValues == spta.cValues);
        pval = prowset->aRow[0].lpProps;
        ASSERT (pval[0].ulPropTag == PR_DISPLAY_NAME);
        //MessageBox(NULL, pval[0].Value.lpszW, TEXT("Message Store"), MB_OK);
        enum {EID, NAME, NUM_COLS};
        // Open the first returned (default) message store
        status= pSession->OpenMsgStore(
              NULL,//Window handle for dialogs
              prowset->aRow[0].lpProps[EID].Value.bin.cb,//size and...
              (LPENTRYID)prowset->aRow[0].lpProps[EID].Value.bin.lpb,//value of entry to open
              NULL,//Use default interface (IMsgStore) to open store
              MAPI_BEST_ACCESS,//Flags
              &lpTempMDB);//Pointer to place the store in
        HALT_ON_ERROR(status);
//        ULONG rgTags[] = { 1, PR_CE_IPM_INBOX_ENTRYID };  // inbox
        ULONG rgTags[] = { 1, PR_CE_IPM_DRAFTS_ENTRYID };  // draft
//        ULONG rgTags[] = { 1, PR_IPM_OUTBOX_ENTRYID };  // outbox
        status = lpTempMDB->GetProps((SPropTagArray *)rgTags, 0L, &cValues, &rgprops);
        HALT_ON_ERROR(status);
        // get folder
        status = lpTempMDB->OpenEntry(
                          rgprops[0].Value.bin.cb, 
                          (LPENTRYID)rgprops[0].Value.bin.lpb, 
                          NULL,                         //We want the default interface    (IMAPIFolder)
                          MAPI_BEST_ACCESS,             //Flags
                          &ulObjType,                   //Object returned type
                          (LPUNKNOWN *) &lpTempFolder); //Returned folder
       HALT_ON_ERROR(status);
       // get folder content
       status = lpTempFolder->GetContentsTable(0L, &pFolderItems);
       HALT_ON_ERROR(status);
       while (TRUE) {
           FreeProws (pRowSetMsg);
           status = pFolderItems->QueryRows (1, 0, &pRowSetMsg);
           if ((status != S_OK) || (pRowSetMsg == NULL) || (pRowSetMsg->cRows == 0))
            {
                break;
            }
           pval = pRowSetMsg->aRow[0].lpProps;
           MessageBox(NULL, pval[0].Value.lpszW, TEXT("Message Item"), MB_OK);
       }
    }
    pSession->Logoff(0, 0, 0);
Error:
    FreeProws (prowset);
 
 
Any ideas why it returns empty list?