vb.net调用beep vbnet main
VB.net如何加载音效？
方法一：调用系统DLL（这个有点不完善，也就是播放声音时窗体无法控制，效果相当于Enabled=true，但音频播放完毕后就没事了）
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Private Declare Function sndPlaySound Lib "Winmm.dll" Alias "sndPlaySoundA" (ByVal lpszSoundName As String, ByVal uFlags As Long) As Long
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim SoundFile As String, Result As Long
SoundFile = "D:\KuGou\Pianoboy - 第105天.wav" '此处为路径
Result = sndPlaySound(SoundFile, 0)
End Sub
方法二：使用WindowsMediaPlayer（WindowsMediaPlayer1的可见为False）
先添加一个windowsmediaplayer控件（工具箱里没有，需要手动添加）
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
WindowsMediaPlayer1.visible=False
Me.WindowsMediaPlayer1.URL = "D:\KuGou\Pianoboy - 第105天.mp3"
End Sub
上面的都是点击button1（按钮1）后播放声音，若是鼠标移动到某控件上发出声音的话改一下触发事件就OK了。
我在VB.net程序中加了Beep没有用！
用Console.Beep(int,int)这个方法就可以了。
另外，建议把提示出错的代码直接放入Catch中，提示鸣放的代码放入Try中。
VB.NET中播放背景音乐最简单的办法是什么啊?
给你我的程序，自己研究一下吧，我也不是很明白。
Public Class Form1
Private Declare Auto Function PlaySound Lib "winmm.dll" (ByVal lpszSoundName As String, ByVal hModule As Integer, ByVal dwFlags As Integer) As Integer
Const SND_filename As Integer = H20000
Const SND_alias As Integer = H10000
Const SND_sync As Integer = H0
Declare Auto Function waveOutGetNumDevs Lib "winmm.dll" Alias "waveOutGetNumDevs" () As Integer
Declare Auto Function sndPlaySound Lib "winmm.dll" (ByVal filename As String, ByVal options As Integer) As Integer
Private Const SND_memory As Integer = H4
Private Const SND_async As Integer = H1
Private Const proess_domain As String = ""
Const SND_sync1 = H0
Const SND_async1 = H1
Const SND_nodefault = H2
Const SND_loop = H8
Const SND_nostop = H10
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Beep()
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim strFileName As String = "start.wav"
PlaySound(strFileName, 0, SND_filename)
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
PlaySound("systemstart", 0, SND_alias Or SND_sync)
End Sub
Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
Dim ret As Long
Dim strfilename As String
strfilename = "start.wav"
ret = sndPlaySound(strfilename.ToCharArray, 0)
End Sub
Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
Dim i As Integer
i = waveOutGetNumDevs()
If i 0 Then
MsgBox("可以播放声音", 64, "检测")
Else
MsgBox("不能播放声音", 64, "检测")
End If
End Sub
End Class
VB.NET，如何调用外部程序？
两种方法
1.
Shell(""Explorer.exe", AppWinStyle.NormalFocus")
2.
Dim proc As New Process
proc.StartInfo.FileName="Explorer.exe"
proc.Start
方法2给予更多的控制，如结束进程的方法Kill
vb.net怎么编程实现从音频输出口输出指定频率指定时长和占空比的单音信号。
1.用Win32 API PlaySound
PlaySound位于"winmm.dll"中，可以根据输入参数的不同，播放WAV类型的音乐。在VB.NET中调用跟VB6中差不多：
先声明：
Private Declare Auto Function PlaySound Lib "winmm.dll" (ByVal lpszSoundName As String, ByVal hModule As Integer, ByVal dwFlags As Integer) As Integer
Const SND_FILENAME As Integer = H20000
Const SND_ALIAS As Integer = H10000
Const SND_SYNC As Integer = H0
具体还有很多常量，不一一列举，下面是播放一个wav文件的例子
Dim mstrfileName As String = "c:\eagle2.wav"
PlaySound(mstrfileName, 0, SND_FILENAME)
注意上面的播放是非同步的，就是说它并不会播放完毕才结束。如果把上面的代码写在一个Button.Click的事件处理程序中，第二次点击的时候它会打断第一次的播放，重新开始。
当然我们也可以调用系统的声音：
PlaySound("SystemStart", 0, SND_ALIAS Or SND_SYNC)
' 以同步的方式调用系统启动时候的声音。
2． 调用媒体播放器控件
VB.NET中并没有提供媒体播放器的.NET组件，没办法我们还是调用以前Com组件Windows Media Player。当然除了声音外，还可以播放视频文件。
首先把媒体播放器控件加到工具栏中，调用还是简单的写一下吧：）
Private Sub playMediaFile(ByVal mediaFileName As String)
With MediaPlayer1
.Stop()
.FileName = "c:\mp3\爱不爱我.mp3"
.Play()
End With
End Sub
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