void AFXAPI DDV_MaxChars( CDataExchange* pDX, CString const& value, int nChars );
Parameters
pDX
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.
value
A reference to a member variable of the dialog box, form view, or control view object with which data is validated.
nChars
Maximum number of characters allowed.
Remarks
Call DDV_MaxChars to verify that the amount of characters in the control associated with value does not exceed nChars.
For more information about DDV, see Adding a Dialog Box in Visual C++ Tutorials and Dialog Data Exchange and Validation in Visual C++ Programmer’s Guide.