Microsoft KB Archive/116017

= PRB: ClassWizard Doesn't Support Custom Foreign DDX =

Article ID: 116017

Article Last Modified on 12/2/2003

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APPLIES TO

 The ClassWizard, when used with:  Microsoft Visual C++ 1.5 Professional Edition

 Microsoft Visual C++ 1.51

 Microsoft Visual C++ 1.52 Professional Edition

 Microsoft Visual C++ 5.0 Learning Edition</li></ul>

 Microsoft Visual C++ 2.0 Professional Edition</li></ul>

 Microsoft Visual C++ 2.1</li></ul>

 Microsoft Visual C++ 4.0 Professional Edition</li></ul> </li></ul>

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This article was previously published under Q116017

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SYMPTOMS
ClassWizard does not allow custom DDX functions for foreign variables.

Custom DDX functions can be implemented by the user and then used by ClassWizard in generating code for member variables. The technique for this is described in "MFC TechNote 26."

If, however, you have created a custom DDX function that is intended to be used to exchange data between a control and a foreign member variable (see "foreign" in the online help), ClassWizard will not recognize that your function is intended for foreign variables, nor will it let you select your new property or type (defined in the "ExtraDDX?" line in the APPSTUDIO.INI file) in conjunction with a foreign variable.

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CAUSE
This is a limitation in all versions listed above of Microsoft Visual C++.

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RESOLUTION
To work around this, manually add your custom DDX_Field* call to your CRecordView's DoDataExchange function.

Additional query words: 1.00 1.50 1.51 1.52 2.00 2.10 4.00 DDX_Proc DDXExtra

Keywords: kbdatabase kbprb kbwizard KB116017

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