BCGControlBar Pro for MFC
virtual void CBCGPEditCtrl::SetOverrideMode ( BOOL  bSet = FALSE)

Enables or disables override mode.

Puts control in the override or insert mode. In the override mode the characters are replaced at the current cursor position (except '\n'). In the insert mode the characters are inserted at the current cursor position.

bSetIf TRUE, the edit control is put into override mode.