100分相送，怎样让程序在上一行代码执行完成后再执行下一行代码呀...

[gopark]

我的一个程序要放完一个MP3后关闭该窗体，
PlayMP3() '调用API播放MP3
Me.Close
现在是不等MP3放完，Me 就Close了，有办法解吗?

[3tzjq]

最好是能得到播放文件所用时间的长度，然后用Timer来倒记时。

[孟子E章]

播放器播放完毕后触发事件的，在这个事件里关闭

[APP开发王]

PlayMP3() '调用API播放MP3
Me.Close

哎呀，你怎么搞的嘛，肯定不会等你播放完了才close嘛！
判断
方法是你的歌曲是否已经放完，再调用me.close！和楼上的差不多！

[gopark]

回楼上:
我就是想知道如何判断MP3已放完,API函数中好像没找到相关的方法和事件...

[ranzige]

可以考虑用一个timer
到了以后就me.close

[tl_pear]

可以参照一下哦！
http://dev.csdn.net/develop/article/62/62047.shtm

[真相重于对错]

看看这个，对你有帮助

ms-help://MS.VSCC.2003/MS.MSDNQTR.2003FEB.2052/cpref/html/frlrfSystemDiagnosticsProcessClassWaitForExitTopic.htm

[淡蓝色2]

我不知道还有什么语言比VB.net2005更方便。
看 只需下面一条语句就能达到楼主的目的.

My.Computer.Audio.Play("XXXX.mp3", AudioPlayMode.WaitToComplete)

[Snrmnm_sx]

兄弟这是我做的一个小播放器的代码，很简单，希望能帮上你的忙！
Private Declare Function GetPrivateProfileString Lib "kernel32" Alias "GetPrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpDefault As String, ByVal lpReturnedString As String, ByVal nSize As Integer, ByVal lpFileName As String) As Integer
Private Declare Function WritePrivateProfileString Lib "kernel32" Alias "WritePrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpString As String, ByVal lpFileName As String) As Integer

Dim s2, s1, s3 As String
Dim s4, s5 As String
Dim s6 As Byte

Private Sub Command1_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Command1.Click
If List1.SelectedIndex < 0 Then List1.SelectedIndex = 0
Call Read_TAG(VB6.GetItemString(List1, List1.SelectedIndex), s1, s2, s3, s4, s5, s6) : Call Show_Tag()
MPlayer1.FileName = VB6.GetItemString(List1, List1.SelectedIndex)
MPlayer1.Play()
Label4.Text = Text1(0).Text
Picture1.Visible = True : Timer2.Enabled = True

End Sub

Private Sub Command2_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Command2.Click
MPlayer1.Stop()
Picture1.Visible = False : Timer2.Enabled = False

End Sub

Private Sub Command3_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Command3.Click
Try
Dim f As String
Dim Result As Windows.Forms.DialogResult
'设置对话框标题
OpenFileDialog1.Title = "打开文件"
'设置Filter文件筛选器
OpenFileDialog1.Filter = "MP3格式(*.MP3)|*.MP3|wav格式(*.wav)|*.wav|mid格式(*.mid)|*.mid|所有文件（*.*）|*.*"
'打开对话框,注意标准对话框都是有模式的打开
Result = OpenFileDialog1.ShowDialog()
'如果单击了“打开”按钮并且FileName不为空时,打开RichTextBox文件
If Result = DialogResult.OK And Len(OpenFileDialog1.FileName) > 0 Then
Me.Label1.Text = OpenFileDialog1.FileName
End If
If OpenFileDialog1.FileName <> "" Then
f = OpenFileDialog1.FileName
List1.Items.Add(f)
End If

'End With
Catch Exc As System.OverflowException
MsgBox("aaaaaaaaaaaa")
End Try

End Sub

Private Sub Command4_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Command4.Click
If List1.SelectedIndex < 0 Then Exit Sub
List1.Items.RemoveAt(List1.SelectedIndex)
End Sub

Private Sub Form1_Load(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles MyBase.Load
Dim i As Short
Dim s As String
MPlayer1.Visible = False
Slider1.Value = MPlayer1.Volume
For i = 0 To 32000
s = INIReadString("列表框", "歌曲" & i, "", VB6.GetPath & "\song.ini")
If s = "" Then Exit For
List1.Items.Add(s)
Next i
Me.Text = System.Reflection.Assembly.GetExecutingAssembly.GetName.Name
End Sub

[Snrmnm_sx]

接着上楼的！
Private Sub Form1_Closed(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles MyBase.Closed
Dim i As Short
For i = 0 To List1.Items.Count - 1
Call INIWriteString("列表框", "歌曲" & i, VB6.GetItemString(List1, i), VB6.GetPath & "\song.ini")
Next i
End Sub

Private Sub List1_DoubleClick(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles List1.DoubleClick
Call Command1_Click(Command1, New System.EventArgs)
End Sub

Private Sub MPlayer1_EndOfStream(ByVal result As Integer)
Dim i As Short
i = List1.SelectedIndex
i = i + 1
If i > List1.Items.Count - 1 Then i = 0
List1.SelectedIndex = i
MPlayer1.FileName = VB6.GetItemString(List1, List1.SelectedIndex)
Call Read_TAG(MPlayer1.FileName, s1, s2, s3, s4, s5, s6) : Call Show_Tag()
Label4.Text = Text1(0).Text
End Sub

Sub Show_Tag()
Text1(0).Text = s1 '歌名
Text1(1).Text = s2 '歌星
Text1(2).Text = s3 '专辑
Text1(3).Text = s4 '出版年
Text1(4).Text = s5 '说明
Text1(5).Text = CStr(s6) '校验码
End Sub

Private Sub Slider1_Scroll(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Slider1.Scroll
MPlayer1.Volume = Slider1.Value - 2500
End Sub

Private Sub Timer1_Tick(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Timer1.Tick
Dim d1, d2 As Short
Dim m1, s1 As Short
Dim m2, s2 As Short
d1 = MPlayer1.CurrentPosition
d2 = MPlayer1.Duration

m1 = d1 \ 60
s1 = d1 Mod 60
m2 = d2 \ 60
s2 = d2 Mod 60

Label3.Text = m1 & ":" & VB6.Format(s1, "00") & " (" & m2 & ":" & VB6.Format(s2, "00") & ")"
End Sub

Private Sub Timer2_Tick(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Timer2.Tick
If VB6.PixelsToTwipsX(Label4.Left) < 0 - VB6.PixelsToTwipsX(Label4.Width) Then

Label4.Left = VB6.TwipsToPixelsX(VB6.PixelsToTwipsX(Picture1.Width) - 1)
Label4.Left = VB6.TwipsToPixelsX(VB6.PixelsToTwipsX(Label4.Left) - 5)
Else
Label4.Left = VB6.TwipsToPixelsX(VB6.PixelsToTwipsX(Label4.Left) - 10)
End If
End Sub

Function Read_TAG(ByRef fname As String, ByRef 歌名 As String, ByRef 歌星 As String, ByRef 专辑名称 As String, ByRef 出版年 As String, ByRef 说明 As String, ByRef 校验码 As Byte)
Dim i As Short, j As Short
Dim k As String
i = FreeFile()

Dim x(127) As Byte

FileOpen(i, fname, OpenMode.Binary, OpenAccess.Read)
'跳到倒数第128位元组
Seek(i, LOF(i) - 127)
'读取127个字符
FileGet(i, x)
'关闭文件
FileClose(i)
If LCase(Chr(x(0)) & Chr(x(1)) & Chr(x(2))) <> "tag" Then
Read_TAG = False
歌名 = ""
歌星 = ""
专辑名称 = ""
出版年 = ""
说明 = ""
校验码 = 0
Exit Function
End If

歌名 = ""
For j = 3 To 32
If x(j) < 128 Then k = Chr(x(j)) Else k = Chr("&H" + Hex(x(j)) + Hex(x(j + 1))) : j = j + 1
歌名 = 歌名 + k
Next
歌星 = ""
For j = 33 To 62
If x(j) < 128 Then k = Chr(x(j)) Else k = Chr("&H" + Hex(x(j)) + Hex(x(j + 1))) : j = j + 1
歌星 = 歌星 + k
Next
专辑名称 = ""
For j = 63 To 92
If x(j) < 128 Then k = Chr(x(j)) Else k = Chr("&H" + Hex(x(j)) + Hex(x(j + 1))) : j = j + 1
专辑名称 = 专辑名称 + k
Next
出版年 = ""
For j = 93 To 96
If x(j) < 128 Then k = Chr(x(j)) Else k = Chr("&H" + Hex(x(j)) + Hex(x(j + 1))) : j = j + 1
出版年 = 出版年 + k
Next
说明 = ""
For j = 97 To 126
If x(j) < 128 Then k = Chr(x(j)) Else k = Chr("&H" + Hex(x(j)) + Hex(x(j + 1))) : j = j + 1
说明 = 说明 + k
Next

校验码 = x(127)

Read_TAG = True
End Function

Function INIReadString(ByRef app As String, ByRef keyw As String, ByRef val_Renamed As String, ByRef inifile As String) As String
Dim i As Integer
Dim k As String
k = New String(" ", 255)
i = GetPrivateProfileString(app, keyw, val_Renamed, k, Len(k), inifile)
k = Trim(k) : k = VB.Left(k, Len(k) - 1)
INIReadString = k
End Function

Sub INIWriteString(ByRef app As String, ByRef keyw As String, ByRef val_Renamed As String, ByRef inifile As String)
Dim xx As Short
xx = WritePrivateProfileString(app, keyw, val_Renamed, inifile)
End Sub

[Snrmnm_sx]

这是之前的相关声明
Option Strict Off
Option Explicit On
Imports System
Imports System.Drawing
Imports System.Windows.Forms
Imports System.IO
Imports VB = Microsoft.VisualBasic

这个小程序经调试通过！环境为：WINDOWS XP 5.1 .NET 2003

[gopark]

都是牛人啊,崇拜中...
100分已不足已表达我对诸位的滔滔江水，中午我会再开一送分贴，敬请留意...

[zm864680106]

学习……