form1.frm

这里有很多很实用的VB编程案例,方便大家学习VB.

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "文本框中光标的位置"
   ClientHeight    =   4185
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   4185
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin VB.TextBox Text1 
      Height          =   2175
      Left            =   360
      MultiLine       =   -1  'True
      ScrollBars      =   3  'Both
      TabIndex        =   0
      Top             =   360
      Width           =   3855
   End
   Begin VB.Label Label2 
      Caption         =   "Label2"
      Height          =   615
      Left            =   480
      TabIndex        =   2
      Top             =   3240
      Width           =   3255
   End
   Begin VB.Label Label1 
      Caption         =   "Label1"
      Height          =   375
      Left            =   480
      TabIndex        =   1
      Top             =   2640
      Width           =   3135
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Const EM_GETSEL = &HB0
Const EM_LINEFROMCHAR = &HC9
Const EM_LINEINDEX = &HBB
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
        (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, _
         lParam As Any) As Long

Public Sub GetCaretPos(ByVal hwnd5 As Long, LineNo As Long, ColNo As Long)
    Dim i As Long, j As Long
    Dim lParam As Long, wParam As Long
    Dim k As Long
    i = SendMessage(hwnd5, EM_GETSEL, wParam, lParam)
    '取得目前Caret所在前面有多少个byte。
    j = i / 2 ^ 16
    '取得前面有多少行。
    LineNo = SendMessage(hwnd5, EM_LINEFROMCHAR, j, 0)
    LineNo = LineNo + 1
    k = SendMessage(hwnd5, EM_LINEINDEX, -1, 0)
    '取得目前caret所在行前面有多少个byte。
    ColNo = j - k + 1
End Sub
Private Sub showmouse()
    Dim LineNo As Long, ColNo As Long
    Call GetCaretPos(Text1.hwnd, LineNo, ColNo)
    Label1.Caption = "光标在第" + CStr(LineNo) + "行"
    Label2.Caption = "光标在第" + CStr(ColNo) + "字符"
End Sub
Private Sub Form_Load()
    Dim k As String
    k = "http://zmhh.mycool.net"
    k = k & Chr(13) & Chr(10)
    k = k & "mailto [e-mail]"
    Text1.Text = k
    showmouse
End Sub

Private Sub Text1_KeyUp(KeyCode As Integer, Shift As Integer)
    showmouse
End Sub

Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
    showmouse
End Sub