The ENPROTECTED structure contains information associated with an EN_PROTECTED notification message. A rich edit control sends this notification when the user attempts to edit protected text.
typedef struct _enprotected {
NMHDR nmhdr;
_WPAD _wPad1;
UINT msg;
_WPAD _wPad2;
WPARAM wParam;
LPARAM lParam;
CHARRANGE chrg;
} ENPROTECTED;