BCGControlBar Pro for MFC
BOOL CBCGPDateTimeCtrl::m_type2DigitsInYear

Specifies whether user can type 2 or 4 digits of the year. If this member is TRUE, the year will be in [CBCGPDateTimeCtrl::m_maxYear2Digits 100 : CBCGPDateTimeCtrl::m_maxYear2Digits] range.