文本框的消息处理二.frm

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VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "读取鼠标所在位置的单词"
   ClientHeight    =   2355
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   5160
   LinkTopic       =   "Form1"
   ScaleHeight     =   157
   ScaleMode       =   3  'Pixel
   ScaleWidth      =   344
   StartUpPosition =   3  'Windows Default
   Begin VB.TextBox Text1 
      BeginProperty Font 
         Name            =   "MS Serif"
         Size            =   12
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   1815
      Left            =   240
      MultiLine       =   -1  'True
      ScrollBars      =   2  'Vertical
      TabIndex        =   0
      Text            =   "文本框的消息处理二.frx":0000
      Top             =   240
      Width           =   4695
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Dim pos As Long, lc As Long
    Dim Line As Integer, CharPos As Integer
    
    pos = X / Screen.TwipsPerPixelX + Y / Screen.TwipsPerPixelY * 65536
    lc = SendMessage(Text1.hwnd, EM_CHARFROMPOS, 0, ByVal pos)
    
    Line = lc \ 65536
    CharPos = lc Mod 65536
    
    MsgBox "