Input/OutPut

How do I make my program to a specified character in a file. Let's say I want it to go to line 15 of the file and to the 40 character!

You need to use a loop, that inputs a line at a time. When uoi have reached the line that you wish to get the character from, then use Mid$() to extract the char from the string.

Code:

---

Private Sub Form_Load()
    MsgBox getChar("e:\test\test.txt", 15, 40)
End Sub

Private Function getChar(strFile As String, lLineNum As Long, lCharNum As Long) As String
    Dim lCount As Long
    Dim strLine As String
   
    Open strFile For Input As #1
   
    Do
      lCount = lCount + 1
      'read in as line
      Line Input #1, strLine
     
      'of we have hit the right line
      If lCount = lLineNum Then
        'return the charcter from the position in lCharNum
        getChar = Mid$(strLine, lCharNum, 1)
        'close
        Close #1
        'and exit
        Exit Function
      End If
    Loop Until EOF(1)
   
End Function

---

If you want to set the caret at a position in a textbox then use the following code:

Code:

---

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

Private Const EM_LINEFROMCHAR = &HC9
Private Const EM_LINEINDEX = &HBB

Public Sub SelectPos(txtBox As TextBox, Row As Long, Col As Long)
    Dim lngPos As Long
    If Row < 1 Or Col < 1 Then
        MsgBox "The row and column numbers must be 1 or higher", vbCritical
        Exit Sub
    End If
    With txtBox
        lngPos = SendMessage(.hwnd, EM_LINEINDEX, Row - 1, 0)
        If lngPos > -1 Then
            .SelStart = lngPos + Col - 1
        End If
    End With
End Sub

---

Just call the SelectPos function in the following manner:

Code:

---

SelectPos Text1, 15, 40

---

Good luck!

[Edited by Joacim Andersson on 09-09-2000 at 08:32 PM]