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Alex Carter
Posts: 59
Joined: 2019-02-21
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I am trying to add a custom X-Header to an outgoing email as in https://www.add-in-express.com/projects/olxheaderexample.zip. I have converted the code to VB as best I can, however I seem to be getting an overflow error when adding the header.
The below is the converted SetHeader method:
Private Sub SetHeader(ByVal itemObj As Object, ByVal headerName As String, ByVal _value As String)
Dim mail As IMAPIProp = Nothing
mail = TryCast(itemObj, IMAPIProp)
If mail IsNot Nothing Then
Dim p As IntPtr = IntPtr.Zero
Dim lpszStr As IntPtr = IntPtr.Zero
Dim propTags As IntPtr = IntPtr.Zero
Dim lpszValue As IntPtr = IntPtr.Zero
Dim lpProblems As IntPtr = IntPtr.Zero
Dim lpPropValue As IntPtr = IntPtr.Zero
Dim _mapiNameID As IntPtr = IntPtr.Zero
Dim propValue As SPropValue = New SPropValue()
Dim mapiNameID As MAPINAMEID = New MAPINAMEID()
Try
Dim g As Guid = New Guid(magicGUID)
_mapiNameID = Marshal.AllocHGlobal(Marshal.SizeOf(GetType(MAPINAMEID)))
p = Marshal.AllocHGlobal(Marshal.SizeOf(g))
Marshal.StructureToPtr(g, p, False)
mapiNameID.lpguid = p
mapiNameID.ulKind = MAPI.MNID_STRING
lpszStr = Marshal.StringToHGlobalUni(headerName)
mapiNameID.lpwstrName = lpszStr
Marshal.StructureToPtr(mapiNameID, _mapiNameID, False)
If mail.GetIDsFromNames(1, _mapiNameID, MAPI.MAPI_CREATE, propTags) = MAPI.S_OK Then
Dim count As Integer = Marshal.ReadInt32(propTags)
If count = 1 Then
[COLOR=red]Dim tag As UInteger = CUInt(Marshal.ReadInt32(New IntPtr(propTags.ToInt32() + 4)))[/COLOR]
tag = ((tag And &HFFFF0000) Or MAPI.PT_STRING8)
lpPropValue = Marshal.AllocHGlobal(Marshal.SizeOf(GetType(SPropValue)))
propValue.ulPropTag = tag
propValue.dwAlignPad = 0
lpszValue = Marshal.StringToHGlobalAnsi(_value)
propValue.Value = lpszValue.ToInt64()
Marshal.StructureToPtr(propValue, lpPropValue, False)
If mail.SetProps(1, lpPropValue, lpProblems) = MAPI.S_OK Then
If mail.SaveChanges(MAPI.KEEP_OPEN_READWRITE) = MAPI.S_OK Then
End If
End If
End If
End If
Finally
If lpszValue <> IntPtr.Zero Then Marshal.FreeHGlobal(lpszValue)
If lpPropValue <> IntPtr.Zero Then Marshal.DestroyStructure(lpPropValue, GetType(SPropValue))
If propTags <> IntPtr.Zero Then MAPI.MAPIFreeBuffer(propTags, HBitness)
If p <> IntPtr.Zero Then Marshal.DestroyStructure(p, GetType(Guid))
If lpszStr <> IntPtr.Zero Then Marshal.FreeHGlobal(lpszStr)
If _mapiNameID <> IntPtr.Zero Then Marshal.DestroyStructure(_mapiNameID, GetType(MAPINAMEID))
End Try
End If
End Sub
I have highlighted the row causing the issue in red, the below is the trace from the error:
System.OverflowException
HResult=0x80131516
Message=Arithmetic operation resulted in an overflow.
Source=eFiles
StackTrace:
at eFiles.AddinModule.SetHeader(Object itemObj, String headerName, String _value) in C:\Projects\eFiles-Office-Integration\eFiles\eFiles\AddinModule.vb:line 1777
Any help is much appreciated! |
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Andrei Smolin
Add-in Express team
Posts: 18825
Joined: 2006-05-11
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Alex Carter
Posts: 59
Joined: 2019-02-21
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Hi Andrei,
That works perfectly! Thanks the swift and helpful reply! |
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Andrei Smolin
Add-in Express team
Posts: 18825
Joined: 2006-05-11
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You are welcome!
Andrei Smolin
Add-in Express Team Leader |
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