Call this function in your property page's DoDataExchange function to synchronize the value of a string property that exactly matches the current selection in a combo box on the property page.
void AFXAPI DDP_CBStringExact(
   CDataExchange* pDX,
   int id,
   CString& member,
   LPCTSTR pszPropName 
);
Parameters
- pDX 
 Pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.
- id 
 The resource ID of the combo box control associated with the control property specified by pszPropName.
- member 
 The member variable associated with the property page control specified by id and the property specified by pszPropName.
- pszPropName 
 The property name of the control property to be exchanged with the combo box string specified by id.
Remarks
This function should be called before the corresponding DDX_CBStringExact function call.
Requirements
Header: afxctl.h