[RESOLVED] Replace the first occurrence of the word in text

ok have a list of 84000 words , and have some articles in these articles i want to replace first occurrence of each word i have in listbox e.g

Code:

---

          For Each item In ListBox1.Items
            Dim mytext As String = "My some text this text is very long text and i want to replace this"
            If ListBox1.Items.Contains(mytext) Then
                mytext = Replace(mytext, mytext, "String to replace")
            End If
        Next

---

but it used to replace the whole mytext i want to replace words in mytext and also it hang the system and very very slow and replace all occurrences i want to replace just the first occurrence any help or idea please.

To replace the first occurrence use:

vb Code:

mytext = Replace(mytext, mytext, "String to replace", 1, 1)

To replace the first two occurrences use:

vb Code:

mytext = Replace(mytext, mytext, "String to replace", 1, 2)

etc...

Thanks. how to search for the word from listbox? problem is i have 84000 words in listbox so it take too much time for each word

try this:

vb Code:

Dim mytext As String = "My some text this text is very long text and i want to replace this"
    
For Each item In ListBox1.Items
    If mytext.Contains(item.ToString) Then
        mytext = Replace(mytext, item.ToString, "replacement text", , 1)
    End If
Next