在TextBox中如何得知Caret所在位置

会计考友

　　在form中放一个textBox两个label
& H* U$ A: h5 s3 K! L) E　　Const EM_GETSEL = &HB0
( t5 |7 @2 O5 J! |% \, K　　Const EM_LINEFROMCHAR = &HC9
　　Const EM_LINEINDEX = &HBB
: v4 `+ ^" C/ }1 I; q4 _　　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)
　　j = i / 2 ^ 16 ’取得目前Caret所在前面有多少个byte
　　LineNo = SendMessage(hwnd5, EM_LINEFROMCHAR, j, 0) ’取得前面有多少行
% y8 ?8 B& F, ]9 |　　LineNo = LineNo + 1
　　k = SendMessage(hwnd5, EM_LINEINDEX, -1, 0)
3 K- R; c0 `% Z  e/ |　　’取得目前caret所在行前面有多少个byte
　　ColNo = j - k + 1
　　End Sub
　　Private Sub Form_Load()
5 u0 K( g5 F9 A2 z* s　　Dim LineNo As Long, ColNo As Long
" C- @# @8 w$ n  k　　Call GetCaretPos(Text1.hwnd, LineNo, ColNo)
6 h% \) E% o% `/ f& w# g1 g0 S2 ~　　Label1.Caption = LineNo
　　Label2.Caption = ColNo
　　End Sub
　　Private Sub Text1_KeyUp(KeyCode As Integer, Shift As Integer)
. _* z7 L0 e0 e, g2 ?　　Dim LineNo As Long, ColNo As Long
9 E. _. ^" ?9 |　　Call GetCaretPos(Text1.hwnd, LineNo, ColNo)
; ~- H6 {% x# v" P4 r8 m! i; S　　Label1.Caption = LineNo
+ g/ ]' p: _6 j' W0 _* }# d　　Label2.Caption = ColNo
2 j! Q+ V& O9 I6 h+ J6 x　　End Sub
/ P5 D9 l, B; H/ O0 p- {　　Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
　　Dim LineNo As Long, ColNo As Long
　　Call GetCaretPos(Text1.hwnd, LineNo, ColNo)
　　Label1.Caption = LineNo
4 S% b) M6 A/ b5 J2 v) \3 v- X8 J- w. q　　Label2.Caption = ColNo
　　End Sub