VB程序如何检测到U盘的插拔 Option Explicit '子类化窗体消息处理函数时需要使用的API Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long Private Declare Function CallWindowProc Lib "