DLL to read and write RTF with Active Messaging

Summary

When writing an Active Messaging client, it would be useful to be able to use rich text formatting (RTF) in the body of the messages that are created. However, the Active Messaging Libraries provide access only to the plain text version of the body of the message, giving no control over the font characteristics of the message body.

This sample contains a DLL with functions that may be called from an Active Messaging client to read and write RTF text of a message.

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More Information

The following are the contents of the Readme.txt file for this sample.

MAPIRTF Sample
--------------

This sample illustrates how use Extended MAPI to allow RTF-formatting in a
message created by Active Messaging.

NOTE: If you are working against Exchange 2000 Server, you need to rebuild
Mapirtf.dll using the C++ source Mapirtf.cpp provided in this article.
Specifically, we need to call RTFSync with RTF_SYNC_RTF_CHANGED | RTF_SYNC_BODY_CHANGED
for the ulFlags parameter.

hr = RTFSync(lpMsg, RTF_SYNC_BODY_CHANGED | RTF_SYNC_RTF_CHANGED, &fUpdated);

Files
-----
The self-extracting executable, Mapirtf.exe, contains the following
files:

- Readme.txt: Contains information about the sample
- Mapirtf.dll: The release version of the DLL
- Mapirtfd.dll: The debug version of the DLL
- Vbmaprtf.exe: Microsoft Visual Basic Active Messaging client
- Vbmaprtf.pdb: Debug symbols for Vbmaprtf.exe
- CSource Folder: Contains the source file and Microsoft Visual C++
version 5.0 workspace and project files for Mapirtf(d).dll
- VBSource Folder: Contains the Microsoft Visual Basic version 5.0
project, form, and module files for Vbmaprtf.exe


General
-------

The files Mapirtf.dll (release version) and Mapirtfd.dll (debug
version) contain the following functions:

- "Writertf" writes RTF-formatted text to a message created by
Active Messaging, when passed the profile name, entry ID of
the message, entry ID of the message store, and the RTF text.

- "Readrtf" reads RTF-formatted text from a message when passed
the profile name, entry ID of the message, entry ID of the
message store, and a string variable to which to store the text.

How to Use
----------

Before use, the DLL files should be placed in the Windows\System
directory (for Windows 95) or the Winnt\System32 directory (for
Windows NT.

In Visual Basic, declare the functions as follows:

' For the Debug version of the DLL, remark the following lines
Public Declare Function writertf _
Lib "mapirtf.dll" _
(ByVal ProfileName As String, _
ByVal MessageID As String, _
ByVal StoreID As String, _
ByVal cText As String) _
As Integer


Public Declare Function readrtf _
Lib "mapirtf.dll" _
(ByVal ProfileName As String, _
ByVal SrcMsgID As String, _
ByVal SrcStoreID As String, _
ByRef MsgRTF As String) _
As Integer


' For the Debug version of the DLL, un-remark the following lines
'Public Declare Function writertf _
Lib "mapirtfd.dll" _
(ByVal ProfileName As String, _
ByVal MessageID As String, _
ByVal StoreID As String, _
ByVal cText As String) _
As Integer


'Public Declare Function readrtf _
Lib "mapirtfd.dll" _
(ByVal ProfileName As String, _
ByVal SrcMsgID As String, _
ByVal SrcStoreID As String, _
ByRef MsgRTF As String) _
As Integer


Sample Code
-----------

The following sample code assumes that you have already declared the DLL
function as described above. For a more complete example, please see the
Visual Basic project accompanying this sample.

- WriteRTF Sample. (This code assumes you already have a variable
called cRTF defined which contains RTF-formatted text.)

Sub SendRTF()
Dim objSession, objMessage, objMessageFilter As Object
Dim MessageID As String
Dim bRet As Integer

Set objSession = CreateObject("MAPI.Session")
objSession.Logon

' Create a new message
Set objMessage = objSession.Outbox.Messages.Add
objMessage.Update
MessageID = objMessage.ID

bRet = WriteRTF(objSession.Name, objMessage.ID, _
objMessage.StoreID, cRTF)

If Not bRet = 0 Then
MsgBox "RTF Not Written Successfully", vbOKOnly, "VBSendRTF Warning"
End If

'Clear our current variable
Set objMessage = Nothing

' Get our message
Set objMessage = objSession.GetMessage(MessageID)

' Send the Message
objMessage.Send ShowDialog:=True
objSession.Logoff
End Sub

- ReadRTF Sample.

Sub ReadRTF()
Dim objSession, objMessage, objMessageFilter As Object
Dim MessageID, cRTF As String
Dim bRet As Integer

Set objSession = CreateObject("MAPI.Session")
objSession.Logon

' Read the first message in the Inbox
Set objMessage = objSession.Inbox.Messages(1)
objMessage.Update ' to get a permanent Entry ID
MessageID = objMessage.ID

' We must initialize the string variable we are passing
' to a string of the maximum length we want to read
cRTF = Space(500)
bRet = ReadRTF(objSession.Name, objMessage.ID, _
objMessage.StoreID, cRTF)

If Not bRet = 0 Then
MsgBox "RTF Not Written Successfully"
Else
MsgBox "RTF Text: " & Chr(13) & cRTF
End If

Set objMessage = Nothing
objSession.Logoff
Set objSession = Nothing
End Sub
Propiedades

Id. de artículo: 172038 - Última revisión: 23 mar. 2009 - Revisión: 1

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