This appears to work quite well:
this.sbLineNo.Text = String.Format("Row {0} Col {1}", this.ActiveDocument.VBScriptTextBox.Caret.LineNumber + 1, this.ActiveDocument.VBScriptTextBox.Caret.Position - this.ActiveDocument.VBScriptTextBox.Lines.Current.StartPosition);
this.sbCount.Text = String.Format("Bytes: {0}", this.ActiveDocument.VBScriptTextBox.TextLength);