Question

记事本VB应用程序代码编写

记事本应用程序，要求实现新建，打开，保存文件，对文本进行字体颜色编辑，对文本实现查找，能够复制粘贴功能。使用子过程或函数过程。
程序代码不少于200行。

Answer 1

’声明查找变量
Dim sFind As String
’声明文件类型
Dim FileType, FiType As String

’初始化程序
Private Sub Form_Load()
’设置程序启动时的大小
Me.Height = 6000
Me.Width = 9000
End Sub

’设置编辑框的位置和大小
Private Sub Form_Resize()
On Error Resume Next ’出错处理
RichTextBox1.Top=20
RichTextBox1.Left=20
RichTextBox1.Height = ScaleHeight-40
RichTextBox1.Width = ScaleWidth-40
End Sub

’新建文件
Private Sub mnuNew_Click()
RichTextBox1.Text = "" ’清空文本框
FileName = "未命名"
Me.Caption = FileName
End Sub

’打开文件
Private Sub mnuOpen_Click()
CommonDialog1.Filter = "文本文档(*.txt)│*.txt│RTF文档(*.rtf)│*.rtf│所有文件(*.*)│*.*"
CommonDialog1.ShowOpen
RichTextBox1.Text = "" ’清空文本框
FileName = CommonDialog1.FileName
RichTextBox1.LoadFile FileName
Me.Caption = "超级记事本：" & FileName
End Sub

’保存文件
Private Sub mnuSave_Click()
CommonDialog1.Filter = "文本文档(*.txt)│*.txt│RTF文档(*.rtf)│*.rtf│所有文件(*.*)│*.*"
CommonDialog1.ShowSave
FileType = CommonDialog1.FileTitle
FiType = LCase(Right(FileType, 3))
FileName = CommonDialog1.FileName
Select Case FiType
Case "txt"
RichTextBox1.SaveFile FileName, rtfText
Case "rtf"
RichTextBox1.SaveFile FileName, rtfRTF
Case "*.*"
RichTextBox1.SaveFile FileName
End Select
Me.Caption = "超级记事本：" & FileName
End Sub

’退出
Private Sub mnuExit_Click()
End
End Sub

’复制
Private Sub mnuCopy_Click()
Clipboard.Clear
Clipboard.SetText RichTextBox1.SelText
End Sub

’剪切
Private Sub mnuCut_Click()
Clipboard.Clear
Clipboard.SetText RichTextBox1.SelText
RichTextBox1.SelText = ""
End Sub

’全选
Private Sub mnuSelectAll_Click()
RichTextBox1.SelStart = 0
RichTextBox1.SelLength = Len(RichTextBox1.Text)
End Sub

’粘贴
Private Sub mnuPaste_Click()
RichTextBox1.SelText = Clipboard.GetText
End Sub

’查找
Private Sub mnuFind_Click()
sFind = InputBox("请输入要查找的字、词：", "查找内容", sFind)
RichTextBox1.Find sFind
End Sub

’继续查找
Private Sub mnuFindOn_Click()
RichTextBox1.SelStart = RichTextBox1.SelStart + RichTextBox1.SelLength + 1
RichTextBox1.Find sFind, , Len(RichTextBox1)
End Sub

’使用说明
Private Sub mnuReadme_Click()
On Error GoTo handler
RichTextBox1.LoadFile "Readme.txt", rtfText ’请写好Readme.txt文件并存入程序所在文件夹中
Me.Caption = "超级记事本：" & "使用说明"
Exit Sub
handler:
MsgBox "使用说明文档可能已经被移除，请与作者联系。", vbOKOnly, " 错误信息"
End Sub

’关于
Private Sub mnuAbout_Click()
MsgBox "超级记事本 Ver1.0 版权所有(C) 2001 土人",vbOKOnly,"关于"
End Sub

’设置弹出式菜单（即在编辑框中单击鼠标右键时弹出的动态菜单）
Private Sub RichTextBox1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Button = 2 Then
PopupMenu mnuEdit, vbPopupMenuLeftAlign
Else
Exit Sub
End If
End Sub

’防止在切换输入法时字体自变(感谢王必成先生提供此方案)
Private Sub RichTextBox1_KeyUp(KeyCode As Integer, Shift As Integer)
If KeyCode = vbKeySpace Then
RichTextBox1.SelFontName = CommonDialog1.FontName
End If
End Sub