Public Declare Function Beep Lib "kernel32" (ByVal dwFreq As Long, ByVal dwDuration As Long) As Long Public Declare Function Beep Lib "kernel32" (B
阅读背景：
这个使PC喇叭发声的API函数beep，为什么在有的机器上会发声，在有的机器上不会发声？代码都一样：
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Public Declare Function Beep Lib "kernel32" (ByVal dwFreq As Long, ByVal dwDuration As Long) As Long Public Declare Function Beep Lib "kernel32" (B
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