[RESOLVED] [2008] RichTextbox syntax highlighting

[Disyne]

I have a richtextbox on my form and currently have made a simple syntax highlighting for it. It works great with a small amount of text but as the text amount increases it starts flashing and locks the textbox while typing.

This is my current code. I call the sub on the textchanged event.

Basically what happens is I have a list of words that it checks for and if it finds it, it colors the word.

    Sub ColorCode()
            Dim selectStart As Integer = rtbCode.SelectionStart
            rtbCode.Select(0, rtbCode.Text.Length)
            rtbCode.SelectionColor = Color.Black
            rtbCode.DeselectAll()
            For Each oneWord As String In event_list
                Dim pos As Integer = 0
                Do While rtbCode.Text.ToUpper.IndexOf(oneWord.ToUpper, pos) >= 0
                    pos = rtbCode.Text.ToUpper.IndexOf(oneWord.ToUpper, pos)
                    rtbCode.Select(pos, oneWord.Length)
                    rtbCode.SelectionColor = Color.DarkBlue
                    pos += 1
                Loop
            Next
            rtbCode.SelectionStart = selectStart
            rtbCode.SelectionLength = 0
    End Sub

Anyway to improve it so it doesn't flash or anything would be great.

[Pirate]

One thing that i'm sure will boost matching keywords is by using regular expression.There are couple of examples if you just google it.I'm sure most of them use regex (regular expression).

[ebonez]

Hey mate.

There's an example in the Codebank forum that shows how you can do it without flicker. Here's a link

http://www.vbforums.com/showthread.php?t=517116