Código
Private Sub Form_Load() Dim pos As Long RichTextBox1.Text = "Sergio dice: Hola" & vbCrLf & _ "Sergio dice: Hola" & vbCrLf & _ "Sergio dice: Hola" & vbCrLf & _ "Sergio dice: Hola" pos = 1 Do While InStr(pos, RichTextBox1.Text, ":") <> 0 RichTextBox1.SelStart = InStr(pos, RichTextBox1.Text, ":") + 1 RichTextBox1.SelLength = 4 RichTextBox1.SelBold = True RichTextBox1.SelColor = vbBlue RichTextBox1.SelStart = Len(RichTextBox1.Text) pos = InStr(pos, RichTextBox1.Text, ":") + 1 Loop End Sub