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To load an ObjectARX application, you use the Load option of the ARX command. After loading, all commands defined by this application are available at the command prompt.
Some ObjectARX applications use large amounts of system memory. If you are finished using an application and want to remove it from memory, use the Unload option of ARX.
You can also load an ObjectARX application with the arxload AutoLISP function. The syntax for the arxload function is almost identical to that of the load function used with AutoLISP files. If the arxload function loads the ObjectARX program successfully, it returns the program name. The syntax for the arxload function is as follows:
(arxload filename [onfailure])
The two arguments for the arxload function are filename and onfailure. As with the load function, the filename argument is required and must be the complete path name description of the ObjectARX program file to load. The onfailure argument is optional and typically not used when you load ObjectARX programs from the command prompt. The following example loads the ObjectARX application myapp.arx.
(arxload "myapp")
As with AutoLISP files, AutoCAD searches the library path for the specified file. If you need to load a file that is not in the library path, you must provide the full path name description of the file.
Attempting to load an application that has previously been loaded results in an error. Before using arxload you should use the arx function to check the currently loaded applications.
To unload an application with AutoLISP, use the arxunload function. The following example unloads the myapp application.
(arxunload "myapp")
Using the arxunload function not only removes the application from memory but also removes the command definitions associated with that application.