PRB: Rule that Applies to All Messages Cannot Be Created

• Exchange Development Kit (EDK), version 5.0

SYMPTOMS

A rule that applies to all the messages that come into an Inbox cannot be created using any of the helper functions such as HRInsert(), because this type of rule requires that the restriction structure be empty.

This is a problem because the HrStringToRestriction() function [used to create a restriction to pass to HRInsert() and other similar functions] fails with MAPI_E_INVALID_PARAMETER when called with a NULL for the restriction string.

CAUSE

The call returns MAPI_E_INVALID_PARAMETER because HrStringToRestriction() expects a string, not a NULL.

RESOLUTION

The following code allows you to programmatically create a rule that applies to all messages. The code provided is not complete. It assumes that you already have a handle to a MAPI session, a pointer to the message store, a pointer to the folder the rule is to be applied to, and that you will release the appropriate structures before exiting the program.

   hr = AllMessageRule(m_lpExchTbl,
               lpFolder,0,lStateFlags,
               lpRes,lpActs,"MSFT:TDX Rules",0,"");

   if (FAILED(hr))
   {
      MessageBox(NULL,"Insert Failed",NULL,MB_OK);
      goto cleanup;
   }

   HRESULT AllMessageRule(IN LPEXCHANGEMODIFYTABLE m_lpExchTbl,
      IN LPMAPIFOLDER   lpFolder,
      IN ULONG          ulSequence,
      IN ULONG          ulState,
      IN LPSRestriction lpRestriction,
      IN LPACTIONS      lpActions,
      IN LPSTR          lpszProvider,
      IN ULONG          ulLevel,
      IN LPSTR          lpszName)
   {
    HRESULT              hr         = S_OK;
    SizedROWLIST(1, RowList) = {0};
    LPROWENTRY      lpRowEntry      = NULL;
    LPROWLIST       lpRowList       = (LPROWLIST)&RowList;
    SPropValue      rgPropVals[9]   = {0};

    rgPropVals[0].ulPropTag     =   PR_RULE_SEQUENCE;
    rgPropVals[0].Value.ul      =   ulSequence;

    rgPropVals[1].ulPropTag     =   PR_RULE_STATE;
    rgPropVals[1].Value.ul      =   ulState;

    rgPropVals[2].ulPropTag     =   PR_RULE_CONDITION;
    rgPropVals[2].Value.ul      =   (ULONG)lpRestriction;

    rgPropVals[3].ulPropTag     =   PR_RULE_ACTIONS;
    rgPropVals[3].Value.ul      =   (ULONG)lpActions;

    rgPropVals[4].ulPropTag     =   PR_RULE_PROVIDER;
    rgPropVals[4].Value.lpszA   =   lpszProvider;

    rgPropVals[5].ulPropTag     =   PR_RULE_LEVEL;
    rgPropVals[5].Value.ul      =   NULL;

    rgPropVals[6].ulPropTag     =   PR_RULE_NAME;
    rgPropVals[6].Value.lpszA   =   lpszName;

    rgPropVals[7].ulPropTag     =   PR_RULE_USER_FLAGS;
    rgPropVals[7].Value.ul      =   NULL;

    rgPropVals[8].ulPropTag     =   PR_RULE_PROVIDER_DATA;
    rgPropVals[8].Value.ul      =   NULL;

    lpRowList->cEntries = 1;

    lpRowEntry = lpRowList->aEntries;

    lpRowEntry->ulRowFlags   = ROW_ADD;
    lpRowEntry->cValues      = 9;
    lpRowEntry->rgPropVals   = (LPSPropValue)rgPropVals;

    // Modify the RULE table

    hr = m_lpExchTbl->ModifyTable(0, lpRowList);

    if (FAILED(hr))
    {
        goto cleanup;
    }

   cleanup:

     ULRELEASE(m_lpExchTbl);

     RETURN(hr);
   } 

Additional query words:

Keywords : kbcode kbAPI kbEDK kbMsg
Version : WINDOWS:5.0
Platform : WINDOWS
Issue type : kbprb