Dim conta As Integer
conta = 0
For i = 1 To 10
Me.RichTextBox1.Text &= "DATOS111111X" & vbNewLine
Me.RichTextBox1.Select(conta, Me.RichTextBox1.Text.Length)
Me.RichTextBox1.SelectionColor = Color.Gold
conta = Me.RichTextBox1.Text.Length
Me.RichTextBox1.Text &= "DATOS222222X" & vbNewLine
Me.RichTextBox1.Select(conta, Me.RichTextBox1.Text.Length)
Me.RichTextBox1.SelectionColor = Color.DarkCyan
conta = Me.RichTextBox1.Text.Length
Next