DateTimeCtrl& SetButtonStyle(Button::Style& style)       { drop.SetStyle(style); return *this; }
	DateTimeCtrl& SetButtonImage(const Image& image)         { drop.SetImage(image); return *this; }
	DateTimeCtrl& SetButtonMonoImage(const Image& image)     { drop.SetMonoImage(image); return *this; }
	DateTimeCtrl& SetButtonWidth(int cx)                     { drop.Width(cx); return *this; }