c#中代码实现说明：

​​MxDrawText text = ​​​​new​​​ ​​MxDrawText();​​
​​text.TextString = ​​​​"BBBBBB"​​​​;​​
​​text.Height = 200;​​
​​MxDrawPoint pt, pt2;​​
​​text.GetBoundingBox(out pt, out pt2);​​
 
​​MessageBox.Show((pt2.x - pt.x).ToString());​​