自制控件的焦点有关问题

自制控件的焦点问题
自制造控件得到焦点时的虚框(如vb自带的connamd)要自己画吗?如何画?用API吗?

------解决方案--------------------
用这个API画:
Declare Function DrawFocusRect Lib "user32 " Alias "DrawFocusRect " (ByVal hdc As Long, lpRect As RECT) As Long