Building Text editor question

I'm building a simple java editor and would like to add a functionality such
as following:

I would like my editor to recognize keywords such as "class", "if",
"switch", "case", "return", etc... Upon recognition, I want the editor to
make those keywords bold face. If I it is possible, I would like the editor to
perform the above action on opening any saved *.java files and also as I type them.
Something similar to VB code editor. Does any one have source code or idea on how to do this ?
Many thanks in advance.

Hi,

Check this thread i think this is what you are looking for.

Add the following to a Form with a RichTextBox.

Code:

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Private Sub HighlightText(sKeyword As String, iColour As Long)
   
    Dim nStart As Integer, sPrevChar As String, sNextChar As String
                                             
    nStart = InStr(1, LCase(RichTextBox1.Text), sKeyword)
                                                                                 
    Do While nStart <> 0
        If nStart > 1 Then
            sPrevChar = Mid$(RichTextBox1.Text, nStart - 1, 1)
        Else
            sPrevChar = " "
        End If
                                                       
        If Len(RichTextBox1.Text) >= nStart + Len(sKeyword) Then
            sNextChar = Mid$(RichTextBox1.Text, nStart + Len(sKeyword), 1)
        Else
            sNextChar = " "
        End If
                                                         
        If (sPrevChar = Chr(32) Or sPrevChar = Chr(13) Or _
        sPrevChar = Chr(10) Or sPrevChar = Chr(9)) And _
        (sNextChar = Chr(32) Or sNextChar = Chr(13) Or _
        sNextChar = Chr(10) Or sNextChar = Chr(9)) Then
            With RichTextBox1
                .SelStart = nStart - 1
                .SelLength = Len(sKeyword)
                .SelColor = iColour
                .SelBold = True
                .SelStart = Len(RichTextBox1.Text)
                .SelColor = iColour
                .SelBold = False
            End With
        End If
                                                 
        nStart = InStr(nStart + Len(sKeyword), LCase(RichTextBox1.Text), sKeyword)
    Loop

End Sub



Private Sub Form_Resize()
    RichTextBox1.Move 0, 0, ScaleWidth, ScaleHeight
End Sub

Private Sub RichTextBox1_Change()

    With RichTextBox1
        .SelStart = 0
        .SelLength = Len(.Text)
        .SelColor = vbBlack
        .SelStart = Len(.Text)
    End With
   
                                       
    ' Add more custom words here
    HighlightText "if", vbBlack
    HighlightText "class", vbBlack
    HighlightText "switch", vbBlack
    HighlightText "if", vbBlack

End Sub

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Thanks a lot for your help.