请教大家个问题 我在用vb上位机收集多个下位单片机传上来的温度数据，我想一旦温度不达标就出报警声，不知在vb中如何实现报警功能最简单呢？刚接触vb 还望朋友们多多指点 谢谢beep 恩 比如我需要报警60S 还得用定时器吧 当然使用Timer计时器. Private Declare Sub Sleep Lib "kernel32" (ByVal milliseconds As Long) Dim dt As Date dt = Now
While DateDiff("s", dt, Now) < 60 Beep Sleep 500 Wend
主板也可以拔放的.麻烦点.注:以下代码未经测试,来自GOOGLE VB code: '打进代码之后直接运行 '//周杰伦的回到过去 Private Declare Function Beep Lib "kernel32" (ByVal dwFreq As Long, ByVal dwDuration As Long) As Long
