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The DDX_OCTextRO function manages the transfer of CString data between a read-only property of an OLE control in a dialog box, form view, or control view object and a CString data member of the dialog box, form view, or control view object.
A pointer to a CDataExchange object. The framework supplies this object to establish the context of the data exchange, including its direction.
The ID of an OLE control in the dialog box, form view, or control view object.
The dispatch ID of a property of the control.
A reference to a member variable of the dialog box, form view or control view object with which data is exchanged.