declare sub mouse_event lib "user32"(byval arg1 as long,byval arg2 as long,byval arg3 as long,byval arg4 as long,byval arg5 as long)
const MOUSEEVENTF_MIDDLEDOWN = &H40&
const MOUSEEVENTF_MIDDLEUP = &H80&
call mouse_event(MOUSEEVENTF_MIDDLEDOWN,0,0,0,0) '按下
call mouse_event(MOUSEEVENTF_MIDDLEUP,0,0,0,0) '弹起