Application of secondary developing technique to AutoCAD to mine resource eveluation

It is introduced that a secondary developing technique to AutoCAD employing Object-Oriented Programming and using Visual Basic 6.0,and its application to mine resource evaluation system.As a result,the evaluation system can draw parametric coal pillar and label the drill data automatically.The application result shows that in the environment of VB,using the graphic function of AutoCAD,this method can shorten the developing period greatly.