How To Debug an MTS Visual Basic Component Running Under ASP

Prerequisites

• Requires Visual Basic 6.0 or later.
• Requires Windows NT 4.0 Service Pack 4 (SP4) or later. MTS debugging is not supported under Windows 95 or Windows 98.
• The Visual Basic Class that you are debugging should have its MTSTransactionMode property set to anything other than 0 - NotAnMTSObject.
• Must compile (build the DLL) and set binary compatibility on the project.

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Step-By-Step Procedures

1. Open a new Visual Basic ActiveX DLL project.
2. Rename Project Name to prjMTSDebug and Class1 to clsMTSDebug
3. Add the following code to clsMTSDebug:

   Public Function Sum( Val1 As Integer, Val2 As Integer) As Integer
   	Sum = Val1 + Val2
   End Function
   					

4. Compile the DLL.
5. Set the binary compatibility for the project.
6. Press F5 to run the project. Accept the default settings, and click OK.
7. Create and add this ASP to one of your virtual directories.

   <%
          Dim Obj
          Set Obj = Server.CreateObject("prjMTSDebug.clsMTSDebug")
          Response.Write Obj.Sum(2,3)
          Set Obj = Nothing
   %>
   					

8. Put a breakpoint in Sum function (in Visual Basic IDE).
9. Run the ASP page from a browser. It breaks at the breakpoint.

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Notes

• Do not deploy an MTS component when you are in a debug session.
• The MTS component that you debug runs as a library package, which doesn't support component tracking, role checking, or process isolation.

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