Accessing Message Queue thru VB6 dll on 64-bit OS, Error 5 Invalid Procedure or argument

Posted on 2008-06-13
Last Modified: 2013-11-26
I am calling a function from a VB6 dll that sends a message to a queue. The message is sent correctly unless I am using Windows 64-bit OS (with the VB6 dll registered there) then I get the Error 5, Invalid procedure or arguement error message..
Question by:TerryWS
LVL 22

Expert Comment

ID: 21787445

Accepted Solution

TerryWS earned 0 total points
ID: 21792761

Public Sub SendMessage(ByVal sMessage As String)

On Error GoTo PROC_ERR


    Const PROC_NAME As String = ".SendMessage"


    Dim oOpenQueue As MSMQQueue

    Dim oQueueMessage As MSMQMessage

    Dim oQueueInfo As MSMQQueueInfo

    Dim sQueueName As String


    sQueueName = GetPDFrequestQueueID


    'make sure we have a queue name

    If Len(Trim$(sQueueName)) = 0 Then

        On Error GoTo 0

        Err.Raise ERROR_EMPTY_MSMQNAME, MODULE_NAME & PROC_NAME, "Queue Name can not be empty."

    End If


    'set the name of the queue to open

    Set oQueueInfo = New MSMQQueueInfo

        oQueueInfo.FormatName = sQueueName


        'open the queue

        Set oOpenQueue = oQueueInfo.Open(MQ_SEND_ACCESS, MQ_DENY_NONE)


            'create the message to put in the queue

            Set oQueueMessage = New MSMQMessage

                With oQueueMessage

                    .Label = "PDF Request"

                    .Body = sMessage

                    .AppSpecific = 0

                    .Delivery = MQMSG_DELIVERY_EXPRESS

                End With


                'send the message

                oQueueMessage.Send oOpenQueue, MQ_NO_TRANSACTION

            Set oQueueMessage = Nothing


            'close the queue



        Set oOpenQueue = Nothing

    Set oQueueInfo = Nothing



    Exit Sub


    Dim lError As Long

    Dim sDesc As String

    Dim sSource As String

    Dim sHelpFile As String

    Dim lHelpContext As Long

    With Err

        lError = .Number

        sDesc = .Description

        sSource = MODULE_NAME & PROC_NAME & " - " & .Source

        sHelpFile = .HelpFile

        lHelpContext = .HelpContext

    End With


    Set oQueueMessage = Nothing

    If Not (oOpenQueue Is Nothing) Then


    End If

    Set oOpenQueue = Nothing

    Set oQueueInfo = Nothing


    Err.Raise lError, sSource, sDesc, sHelpFile, lHelpContext

End Sub

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