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Call DDV_MaxChars to verify that the amount of characters in the control associated with value does not exceed nChars.

void AFXAPI DDV_MaxChars( 
   CDataExchange* pDX, 
   CString const& value, 
   int nChars  


A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.


A reference to a member variable of the dialog box, form view, or control view object with which data is validated.


Maximum number of characters allowed.

For more information about DDV, see Dialog Data Exchange and Validation.

Header: afxdd_.h