Microsoft KB Archive/139001

= PRB: Visual C++ Integration Does Not Recognize .CLW Files =

Article ID: 139001

Article Last Modified on 5/4/2001

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APPLIES TO


 * Microsoft Visual SourceSafe 4.0 Standard Edition
 * Microsoft Visual SourceSafe 5.0 Standard Edition
 * Microsoft Visual SourceSafe 6.0 Standard Edition
 * Microsoft Visual C++ 4.0 Standard Edition

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This article was previously published under Q139001



SYMPTOMS
In Visual C++ 4.0, you cannot check in or check out the Class Wizard status file (.clw file) for a project that is based on Microsoft Foundation Classes (MFC). The .clw file tracks the mapping between resources and classes for a Visual C++ generated MFC project. The format of this text file is undocumented, but it can be easily regenerated.



STATUS
This behavior is by design.



MORE INFORMATION
When you add a project to source control, Visual C++ does not allow you to include the .clw file under source control. This is because, in a multi- developer environment, it is easier to regenerate a .CLW file. Because the format is undocumented, it would not be easy to merge a .CLW file that results from several developers dynamically adding and removing resources, classes, or OLE information to a project they are working on.

When you check out a project that does not have a .CLW file, Visual C++ detects it and prompts you to recreate it. For a project MDI.MDP in the directory C:\CODE\MDI, you would get a message like this one:

The ClassWizard database "C:\code\mdi\MDI.CLW" does not exist. Would you like to build it from your source files?

If you answer Yes, Visual C++ scans the AppWizard- or ClassWizard-generated files and rebuilds the .clw file. If the .clw file does not rebuild properly, check the formatting of your file. It may be incorrect. The macros or comments that Visual C++ expects to see to use the file with ClassWizard might be the source of the problem. With Visual SourceSafe, you can add the .clw file to a project. However, Developer Studio does not allow multiuser merge of this file, so Microsoft recommends that you not put a .clw file under source control.

