INFO: Type Libraries for Office 2000 Have Changed

ID: Q224925

The information in this article applies to:

Microsoft Word 2000
Microsoft Excel 2000
Microsoft PowerPoint 2000
Microsoft Access 2000
The Microsoft Foundation Classes (MFC)

SUMMARY

The type libraries for the Microsoft Office 2000 products have changed since Microsoft Office 97. Although the Office 2000 type libraries contain the functions that were present in the Office 97 type libraries, there have been additions to the number of arguments for some functions. If you use ClassWizard-generated wrapper classes for an Office 2000 product with code that was developed for an Office 97 product, you might receive the following compilation error:

error C2660: '(function)' : function does not take (n) parameters

This error occurs because the Office 97 function required fewer arguments than the Office 2000 version of that function. This article describes how to correct these errors so that you can use code developed for an Office 97 product with the Office 2000 type library.

MORE INFORMATION

One such function that has changed is the Microsoft Word 2000 Add method of the Documents object. If you've used the ClassWizard to generate class wrappers for the functions in the Microsoft Word 2000 type library and you use code that worked with Microsoft Word 97, you will receive the compile error previously described. The following describes how you can correct this problem. Note that although the case illustrated applies to code that specifically automates Word, the same information can be applied to the other Microsoft Office applications.

With the Word 97 type library, you could use the following code to automate Word and start a new document:


   _Application oApp;
   Documents oDocs;
   _Document oDoc;
   COleVariant vtOptional((long)DISP_E_PARAMNOTFOUND,VT_ERROR),
               vtTrue((short)TRUE),
               vtFalse((short)FALSE);

   // Create an instance of Word
   if (!oApp.CreateDispatch("Word.Application")) 
   {
      AfxMessageBox("Word failed to start!");
      return;
   } 
	
   // Add a new document and make Word visible
   oDocs = oApp.GetDocuments();
   oDoc = oDocs.Add(vtOptional,vtOptional);
   oApp.SetVisible(TRUE);

If you attempt to run this code against the Word 2000 type library, you will receive the compile error C2660 "'Add' : function does not take 2 parameters" for the following line of code:


     oDoc = oDocs.Add(vtOptional,vtOptional);

To correct this problem, you can perform the following steps.

Go to the ClassView tab of the Project Workspace window.

In the Classes list for your workspace, double-click the Documents class to display its members.

Locate the Add Member function and you will see that it is expecting four arguments. Your code is only passing two arguments, thus you receive the complile error.

Refer to the Visual Basic Help in Microsoft Word and locate the topic for the Add Method of the Documents object to determine what type of data to use for these arguments and/or to determine if the arguments are optional. In this case, both new arguments are optional.

Return to your project and modify the offending line of code to read:


   oDoc = Docs.Add(vtOptional,vtOptional,vtOptional,vtOptional);

Recompile the project. It should now compile without the error.

Automating Both Office 97 and 2000 Applications

If you intend to write MFC code that will automate both the 97 and 2000 versions of a Microsoft Office application, you should use the ClassWizard to generate wrapper classes from the Office 97 type library. Your code will be backwards compatible and you will not need to be concerned with the additional arguments that the Office 2000 type library might present.

REFERENCES

For more information on Office Automation, please visit the Microsoft Office Development support site at:

http://support.microsoft.com/support/officedev/

Keywords : kbAccess kbAutomation kbExcel kbMFC kbVC kbPowerPt kbWord kbGrpDSO
Version : WINDOWS:2000; winnt:
Platform : WINDOWS winnt
Issue type : kbinfo