I am receiving the following error when instantiating a MAPI client class within my Visual FoxPro 6 SP5 application:

80040112: Class is not licensed for use

The error occurs at the point where a Mapi Session or Message is being created with one of these two lines:

.oSession = createobject("MSMAPI.MAPISESSION")
.oMessage = createobject("MSMAPI.MAPIMESSAGES")

Anyone have any thoughts? I'll continue below with what I've tried so far.

[Debugging Done to find Issue]
1) Windows XP SP2 with Microsoft Office 2000 and SP1 Virtual PC for testing

2) This issue is most likely a missing DLL, OCX, or registry "license" key. Thus most of my testing has been along this route

3) I tried the watch utility in installsheild to monitor what is being used. I then included those files, or the MSI Merge Module containing them, in my installation routine and installed. No Joy

4) I then moved to manual searches of differences in Mapi files between my Dev machine and the failed client. The only thing I find missing is MAPIR.DLL located in the C:\Program Files\Common Files\SYstem\MSMAPI\1033\MAPIR.DLL. I moved that file into the location (copying from Dev) and tried a regsvr32.exe. I get the DLLEntryPoint Server Not Found error when attempting to register. The license error still occurs in my application on the test machine. I can not find any information on what MAPIR.dll does in terms of MAPI

5) I then installed Visual Studio 6 on the machine. Viola... everything works. So at this stage I know one thing... whatever the problem, installing Visual Studio Fixes it.

6) Then tried the same install on Windows 2000 with Office 2000 on a seperate Virtual machine. This was done in case problems with the office install were the culprit... No Joy... same error.

7) Since then I've tried a myriad of installs and unistalls (the virtual machine is returned to unloaded state each time, no dll/ocx etc) varying different DLLs in an attempt to fix... No Joy

I could go on for hours with what I've tried but I think this information is the most useful.

Okay Thread... I need some saving.