算了，都贴上，你自己看吧：
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//设置文件类型
//书写规则例如：txt files(*.txt)|*.txt
saveFileDialog.Filter = "txt files(*.txt)|*.txt|xls files(*.xls)|*.xls|All files(*.*)|*.*"
//设置默认文件名（可以不设置）
saveFileDialog.FileName = "siling-Data"
//主设置默认文件extension（可以不设置）
saveFileDialog.DefaultExt = "xml"
//获取或设置一个值，该值指示如果用户省略扩展名，文件对话框是否自动在文件名中添加扩展名。（可以不设置）
saveFileDialog.AddExtension = true
//设置默认文件类型显示顺序（可以不设置）
saveFileDialog.FilterIndex = 2
//保存对话框是否记忆上次打开的目录
saveFileDialog.RestoreDirectory = true
这个啊，呵呵，应该不难吧
先找到你要打开的应用程序的文件
然后用一个调用代码：
System.Diagnostics.Process.Start("C:\WINDOWS\system32\notepad.exe")
这是要开记事本的
System.Diagnostics.Process.Start("C:\WINDOWS\system32\calc.exe")
这是打开计算器的
应该也可以把这两个应用程序复制到你的程序的默认目录下，就是BIN下吧！
呵呵，试试！！要给我加分哦！！！
vb编写的简单记事本代码
Dim b As String
Dim a As String
Dim m As String
Dim x As String
Private Declare Function SetWindowPos Lib "user32" ( _
ByVal hwnd As Long, _
ByVal hWndInsertAfter As Long, _
ByVal x As Long, ByVal Y As Long, _
ByVal cx As Long, ByVal cy As Long, _
ByVal wFlags As Long _
) As Long
Const HWND_TOPMOST = -1
Const SWP_SHOWWINDOW = H40
Private Sub baocun_Click()
Dim abc As String
If Len(Trim(m)) = 0 Then
m = "f:"
End If
abc = m "\" Text2.Text ".txt"
Open abc For Output As #1
Write #1, Text1.Text
Close #1
Label2.Caption = "保存的路径为：" m "\" Text2.Text ".txt"
a = MsgBox("保存成功！" Chr(13) "是否退出程序", 4 + 64 + 0, "提示")
If a = vbYes Then
End
End If
End Sub
Private Sub Command1_Click()
Dir1.Visible = False
Drive1.Visible = False
m = Dir1.Path
Command1.Visible = False
b = MsgBox("你选的文件夹是：" m, vbYesNo + vbDefaultButton1 + 48, "提示")
If b = vbNo Then
Dir1.Visible = True
Drive1.Visible = True
Command1.Visible = True
Else
Dir1.Visible = False
Drive1.Visible = False
Command1.Visible = False
End If
End Sub
Private Sub Command2_Click()
MsgBox (App.Path + "1.ico")
End Sub
Private Sub dakai_Click()
CommonDialog1.Filter = "文本文件(*.txt)|*.txt"
CommonDialog1.ShowOpen
Open CommonDialog1.FileName For Input As #1
Dim abc As String
linefromfile = StrConv(InputB(LOF(1), 1), vbUnicode)
Text1.Text = linefromfile
Close #1
End Sub
Private Sub Drive1_Change()
Dir1.Path = Drive1.Drive
End Sub
Private Sub Form_Load()
Drive1.Drive = "f:\"
Dir1.Visible = False
Drive1.Visible = False
Command1.Visible = False
Dim fullpath As String
If Right(App.Path, 1) = "\" Then
fullpath = App.Path + "1.ico"
Else
fullpath = App.Path + "\" + "1.ico"
Form1.Icon = LoadPicture(fullpath)
End If
End Sub
Private Sub lingcunwei_Click()
Dim abc As String
CommonDialog1.ShowSave
If Len(Trim(CommonDialog1.FileName)) 0 Then
x = CommonDialog1.FileName
Else
x = "f:\1.txt"
End If
Open x For Append As #1
Write #1, Text1.Text
Close #1
End Sub
Private Sub s_Click()
Text1.FontSize = 5
End Sub
Private Sub sanhao_Click()
Text1.FontSize = 12
End Sub
Private Sub st_Click()
CommonDialog1.ShowFont
End Sub
Private Sub shybcdwjj_Click()
Dir1.Visible = True
Drive1.Visible = True
Command1.Visible = True
End Sub
Private Sub Text2_GotFocus()
Dir1.Visible = False
Drive1.Visible = False
Command1.Visible = False
End Sub
Private Sub tuichu_Click()
End
End Sub
Private Sub wh_Click()
Text1.FontSize = 10
End Sub
Private Sub whs_Click()
Text1.FontSize = 10.5
End Sub
Private Sub xinjian_Click()
Text1.Text = ""
Text2.Text = ""
End Sub
Private Sub yh_Click()
Text1.FontSize = 24
End Sub
Private Sub zstj_Click()
MsgBox "所有字数为" Len(Text1.Text), , " 字数"
End Sub
Private Sub ztys_Click()
CommonDialog1.ShowColor
Text1.ForeColor = CommonDialog1.Color
End Sub
Private Sub zzqm_Click()
Dim retValue As Long
'将窗体设置为处于所有窗口的顶层，注意在 VB 中运行时，可能不行，但编译成EXE后就可以了
retValue = SetWindowPos(Me.hwnd, HWND_TOPMOST, Me.CurrentX, Me.CurrentY, 380, 615, SWP_SHOWWINDOW)
End Sub
Dim WithEvents SvaeFileDialog1 As New SaveFileDialog
Private Sub button1_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles button1.Click
Dim pp As String
SvaeFileDialog1.Filter = "文档文件(*.txt)|*.txt|所有文件(*.*)|*.*"
Dim r As MsgBoxResult
r = SvaeFileDialog1.ShowDialog
If r Then
FileOpen(1, SvaeFileDialog1.FileName, OpenMode.Output)
pp = Mid(Me.TextBox1.Text, 1, Len(Me.TextBox1.Text))
Print(1, pp)
Close()
MsgBox("Export Successfully!")
End If
End Sub
以上VS2010 WPF程序。
