[RESOLVED] SendMessageString!

In order to find whether a particular item exists in a ListBox, SendMessageString can be used like this:

lngRetValue = SendMessageString(ListBox1.hWnd, LB_FINDSTRINGEXACT, -1&, "text to be compared")

In the same way, can SendMessageString be used to find whether a particular text exists in a text file? If so, how?

Thanks,

Arpan

oops! ok, it was a text file.. :blush:

Quote:

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I think that doesn't work with a Textbox, but you can do:

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But where from are you getting the TextBox? I am referring to a TEXT FILE & not a TextBox.

Arpan

Quote:

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Originally Posted by arpan_de

But where from are you getting the TextBox? I am referring to a TEXT FILE & not a TextBox.

Arpan

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Arpan, its impossible unless you open the file for reading first.

Quote:

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Arpan, its impossible unless you open the file for reading first.

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It's pretty obvious that to access data in a text file, the text file has to be opened first. So I guess it goes without saying that the text file has to be opened first to read its contents & do something with that.....

Arpan

Then you could do something like this:

VB Code:

Dim tmp As String
 
Private Sub Command1_Click()
    If tmp Like "*Text to be compared*" Then
        MsgBox "The string is in the file"
    End If
End Sub
 
Private Sub Form_Load()
    Open "C:\YourFile.txt" For Binary As #1
        tmp = Space(LOF(1))
        Get #1, , tmp
    Close #1
End Sub

Okay then open the file and use instr?? Whats wrong??

Quote:

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Then you could do something like this:

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I tried it Jcis but it doesn't work. If I include a MsgBox tmp in the Command1_Click event function, then tmp always turns out to be an empty string.

Arpan

SendMessage (regardless if you have renamed it SendMessageString or not) is used to send messages to different windows (or controls if you like). It is not used to send messages to a file since a file wouldn't be able to respond to such a message. To be able to search a file you need to read the content of it and then do a search in the variable that contains this content. For a regular text file you read it the normal way and then search the string using InStr for example.

If you want to match a certain line in a text file you can split the lines into an array and search each of them in turn.

Something like this should find a string

VB Code:

Option Explicit
 
Private Sub Form_Load()
  Dim x As Integer
  Dim ff As Integer
  Dim strBuff As String
  ff = FreeFile
  Open App.Path & "\to do.txt" For Input As #ff
    strBuff = Input(LOF(ff), ff)
  Close #ff
  x=instr(strbuff,text1.text)
  if x > 0 then
    strRetValue = mid$(strBuff,x,len(text1.text))
    msgbox "Found"
  else
    msgbox "Not Found"
  endif
End Sub