VB程序如何检测到U盘的插拔OptionExplicit'子类化窗体消息处理函数时需要使用的APIPrivateDeclareFunctionSetWindowLongLib"user32"Alias"SetWindowLongA"(ByValhwndAsLong,ByValnIndexAsLong,ByValdwNewLongAsLong)AsLongPrivateDeclareFunctionCallWindowProcLib"user32"Alias"CallWindowProcA"(ByVal