是的,用这个就可以了。问题是你要将调用Beep的代码放到合适的位置。 '这是我个人的dll的代码,一段音乐,不刺耳,听着效果还行。 Private Declare Function Beep Lib "kernel32" (ByVal dwFreq As Long, ByVal dwDuration As Long) As LongPublic Sub PlaySoundByBeep() Dim i As Long
For i = 0 To 4 Call Beep(1000 * i, 100 * (5 - i)) Call Beep(1000 * (5 - i), 100 * i) DoEvents Next End Sub
'这是我个人的dll的代码,一段音乐,不刺耳,听着效果还行。
Private Declare Function Beep Lib "kernel32" (ByVal dwFreq As Long, ByVal dwDuration As Long) As LongPublic Sub PlaySoundByBeep()
Dim i As Long
For i = 0 To 4
Call Beep(1000 * i, 100 * (5 - i))
Call Beep(1000 * (5 - i), 100 * i)
DoEvents
Next
End Sub
关于如何控制并口,参阅:
http://download.csdn.net/detail/veron_04/3152172
我几年前做过类似开发,效果还行。
问题的关键在于这个继电器一定要选好,通常是固态继电器