Choose the "Objects" sub-section and from the list choose the Object whose Properties you would like list. Under AutoCAD Help, open "Visual Lisp and AutoLisp" and then "ActiveX and VBA Reference". There are a couple of ways of going about this. You might say that telephones have a "Dial" method, and you could use this syntax to dial a seven digit number 3334444:īefore you can start to change an Objects Properties or Methods, you need to know what Properties and Methods are available to the particular Object. For example, you dial a telephone to make a call. Generally, methods are actions you want to perform, while properties are the attributes you set or retrieve. Methods are part of objects just as properties are. In addition to properties, objects have methods. If you could control a radio with Visual Lisp, you might write code in a procedure that changes the value of the "Volume" property from 3 to 5 to make it play louder : (vla-put-Volume Radio 5) Assume you can set the volume of a radio from 0 to 10. In Visual Lisp, you might say that a radio has a "Volume" property that you can adjust by changing its value. Consider a radio: One property of a radio is its volume. You can change an Object's characteristics by changing it's properties. Visual Lisp Objects support properties and methods, In Visual Lisp, an Object's data (settings or attributes) are called "properties", while the various procedures that can operate on an Object are called it's "methods".
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Property or Method for each Object is way beyond the scope of thisįirst of all, let's have a look at defining a Property and a Method. Methods which differ from Object to Object. Each Object within AutoCAD has numerous Properties and
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#Autocad lisp detect read only how to
You, first how to find the Properties and Methods available for an Object,Īnd secondly to describe the usage of such Property or Method within The Properties and Methods of every AutoCAD Object, but rather to show The aim of this tutorial is not to describe