Private Sub ImgUndo_Click()
Text1.Text = UndoString
End Sub

Private Sub ImgUndo_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Button = 1 Then
'“按下”按钮
ImgUndo.Picture = ImageDown.ListImages("Undo").Picture
End If
End Sub

Private Sub ImgUndo_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
Label1 = "取消当前操作"

'判断鼠标位置,显示不同图像
If Button = 1 And (X > 0 And X < ImgNew.Width And Y > 0 And Y < ImgNew.Height) Then
ImgUndo.Picture = ImageDown.ListImages("Undo").Picture
ElseIf Button = 1 Then
ImgUndo.Picture = ImageUp.ListImages("Undo").Picture
End If
End Sub

Private Sub ImgUndo_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Button = 1 Then
'“抬起”按钮
ImgUndo.Picture = ImageUp.ListImages("Undo").Picture
End If
End Sub
Private Sub New_Click()
FileName = ""
Text1 = ""
ImgUndoDisable
End Sub

Private Sub Open_Click()
Dim FileNum As Integer
Dim buffer As String
Dim buffer1 As String
Dim FileSize As Long
Dim MaxLen As Long

MaxLen = 32768 '文件最大长度

CommonDialog1.ShowOpen '显示"打开文件"对话框

If Len(CommonDialog1.FileName) > 0 Then
'有输入文件名
FileName = CommonDialog1.FileName '保存文件名
FileSize = FileLen(FileName) '获得文件长度
If FileSize > MaxLen Then
'文件超长
MsgBox "该文件过大，只能显示部分文本", , "警告"
Exit Sub
End If

Screen.MousePointer = 11 '设置鼠标为沙漏

FileNum = FreeFile() '获得可用文件号
Open FileName For Input As FileNum '以顺序输入方式打开文件

Do While Not EOF(FileNum) And Len(buffer) < MaxLen '读必须文本小于 32K
Line Input #FileNum, buffer1 '读一行文字 www.dxs56.com
buffer = buffer + buffer1 + Chr(13) + Chr(10) '加入回车换行符
Loop '循环体

Close FileNum '关闭文件

ImgUndoDisable '取消 Undo 功能

Text1.Text = buffer '显示文本
UndoNew = buffer '保存文本
buffer = "" '释放内存
buffer1 = ""
Screen.MousePointer = 0 '恢复鼠标指针
Me.Caption = "记事本 - " + FileName '修改标题显示
End If
End Sub

Private Sub Paste_Click()
Text1.SelText = Clipboard.GetText
End Sub

Private Sub Picture1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
Label1 = "工具栏"
End Sub

Private Sub Picture1_Resize()
If Picture1.Width > Label1.Left Then
Label1.Width = Picture1.ScaleWidth - Label1.Left
End If
End Sub

Private Sub Save_Click()
Dim FileNum As Integer '文件句柄号

CommonDialog1.ShowSave '显示保存对话框
If Len(CommonDialog1.FileName) > 0 Then
'有输入文件名
FileName = CommonDialog1.FileName '保存文件名
FileNum = FreeFile() '获得可用文件号
Open FileName For Output As FileNum '打开输出文件
'如果无指定文件，则创建新文件
Print #FileNum, Text1.Text '输出文本
Close FileNum '关闭文件
Me.Caption = "记事本 - " + FileName '修改标题显示
ImgUndoDisable
End If
End Sub

Private Sub Text1_Change()
If Not
ImgUndo.Enabled Then
'使“Undo”按钮可用
ImgUndoEnable
End If
UndoString = UndoNew
UndoNew = Text1
End Sub

Private Sub Text1_Click()
Check_ImgCutCopy
End Sub

Private Sub Text1_KeyUp(KeyCode As Integer, Shift As Integer)
Check_ImgCutCopy
End sub

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