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Excel automation controller

I am trying to use Visual C++ 5.0 to create an automation controller for Microsoft Excel.  The code that I have is API based some using MFC would be difficult at best.  While poking through the Visual C++ help files, I came across the #import directive, and was excited to see that this compiler directive would generate wrapper classes for me based on a type library file.  When I added "#import ..\excel8.olb" and tried to compile I got and undeclared identifier on MsoRGBType.  My guess is that I need to #import another file before excel8.olb.  Is this correct and if so which file is it?
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#import <mso97.dll> no_namespace rename("DocumentProperties", "DocumentPropertiesXL")  
#import <vbeext1.olb> no_namespace  
#import <excel8.olb> rename("DialogBox", "DialogBoxXL") rename("RGB", "RBGXL") rename("DocumentProperties", "DocumentPropertiesXL") no_dual_interfaces

There is a sample that comes with Visual C++ 5.0.

Visual C++ Samples\Compiler COM Support Samples\COMEXCEL: Demonstrates an Automation Client Application with Compiler COM Support
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