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On loading, the application usually lists the command name(s) which it defines and which is then used to start or control the application functionality. Only after you load the application into the running session (and current drawing), the functions and commands programmed in the specific application will become available. You can load ("install") a LSP, VLX or FAS file containing an add-on application or utility into AutoCAD just by mouse-dragging it from Windows Explorer (or other file manager) to the AutoCAD window. The LISP code has to be loaded into AutoCAD. I have downloaded a VLX or LSP file - what can I do now to use it? Use the S::STARTUP function to define commands that need to be issued immediately when you begin a drawing session.įor commands that require the selection of an object (like the AutoCAD BREAK and TRIM commands), you can supply a list obtained with entsel instead of a point to select the object.Ĭommands executed from the command function are not echoed to the command line if the AutoCAD CMDECHO system variable (accessible from setvar and getvar) is set to 0.How to load/install a LISP application in AutoCAD? mnl file, it should be called only from within a defun statement. If the AutoCAD SCRIPT command is used with the command function, it should be the last function call in the AutoLISP routine.Īlso, if you use the command function in an. The AutoCAD SKETCH command reads the digitizer directly and therefore cannot be used with the AutoLISP command function. Until you do so, any subsequent commands will fail. You must manually activate the AutoCAD window and respond to the prompts. If the command requires user input, you'll see the return value ( nil) in the Console window, but AutoCAD will be waiting for input. Note that if you issue command from Visual LISP on Windows, focus does not change to the AutoCAD window. AutoCAD recognizes command names only when it issues a Command prompt. It submits command names and options as strings, 2D points as lists of two reals, and 3D points as lists of three reals. The command function evaluates each argument and sends it to AutoCAD in response to successive prompts.