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？

[解决办法]
用这个API画：
Declare Function DrawFocusRect Lib "user32 " Alias "DrawFocusRect " (ByVal hdc As Long, lpRect As RECT) As Long