Using C#, I've created a simple wrapper class for using Excel.  I have
Office Pro 2003 installed on my devel machine.  The wrapper class works
great, reading and writing to/from Excel.  To do this, I created a
reference to "Microsoft Excel 11.0 Object Library", and have a "using
Excel;" directive.

I decided to add a method for creating a TextBox using the
Shapes.AddTextBox method, which requires a
Microsoft.Office.Core.MsoTextOrientation as a parameter.  Unfortunately,
I can't find what I need to reference to get the Microsoft.Office.Core
namespace into my project.  I've tried adding references to "Microsoft
Office 11.0 Object Library" in COM,  but that didn't provide me with the
needed namespace.

I then added a reference to  "Office" (version 11.0.0.0) in the GAC, and
received the following errors:

D:\Work\CSharp\ExcelWrapper\ExcelWrapper.cs(303,10) : error CS0012: The
type 'Microsoft.Office.Core.MsoTextOrientation' is defined in an
assembly that is not referenced. You must add a reference to assembly
'office, Version=11.0.0.0, Culture=neutral,
PublicKeyToken=71e9bce111e9429c'.
D:\Work\CSharp\ExcelWrapper\ExcelWrapper.cs(303,20) : error CS1502: The
best overloaded method match for
'Excel.Shapes.AddTextbox(Microsoft.Office.Core.MsoTextOrientation,
float, float, float, float)' has some invalid arguments
D:\Work\CSharp\ExcelWrapper\ExcelWrapper.cs(305,17) : error CS1503:
Argument '1': cannot convert from
'Microsoft.Office.Core.MsoTextOrientation
[c:\WINDOWS\assembly\GAC\Office\7.0.3300.0__b03f5f7f11d50a3a\Office.dll]'
to 'Microsoft.Office.Core.MsoTextOrientation []'

Any help would be greatly appreciated,
Michael