How To Write Autocad Lisp Routines
Free Autocad Lisp Routines
Autocad Lisp Routine To Insert Block
Writing Autocad Lisp Routines
Autocad Loading Lisp Routines

Load AutoLISP routines at start up and execute commands or functions at specific times during a drawing session.

AutoCAD-based products load the contents of three user-definable files automatically: acad.lsp, acaddoc.lsp, and the MNL file that accompanies your current customization file.

By default, the acad.lsp file is loaded only once, when the program starts, whereas acaddoc.lsp is loaded with each individual document (or drawing). This lets you associate the loading of the acad.lsp file with application startup, and the acaddoc.lsp file with document (or drawing) startup. The default method for loading these startup files can be modified by changing the setting of the ACADLSPASDOC system variable.

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If one of these files defines a function of the special type S::STARTUP, this routine runs immediately after the drawing is fully initialized. As an alternative, the APPLOAD command provides a Startup Suite option that loads the specified applications without the need to edit any files.

The acad.lsp and acaddoc.lsp startup files are not provided with AutoCAD-based products. It is up to the user to create and maintain these files.

Note: Starting with AutoCAD 2014-based products, custom applications must work under secure mode; when the SECURELOAD system variable is set to 1 or 2. When operating under secure mode, the program is restricted to loading and executing files that contain code from trusted locations; trusted locations are specified by the TRUSTEDPATHS system variable.

Command Autoloader

When you load an AutoLISP file, the command definitions in the file take up memory whether or not you actually use the commands. The AutoLISP autoload function makes a command available without loading the entire routine into memory. Adding the following code to your acaddoc.lsp file automatically loads the commands CMD1, CMD2, and CMD3 from the cmds.lsp file and the NEWCMD command from the newcmd.lsp file.

The first time you enter an automatically loaded command at the Command prompt, AutoLISP loads the entire command definition from the associated file. AutoLISP also provides the autoarxload function for ObjectARX applications.

Note: Like-named AutoLISP startup files are loaded based on their Modified time stamp; the LSP file with the most recent time stamp is loaded unless you specify the full file name (including the file name extension).

The ACAD.LSP File

You can create an acad.lsp file if you regularly use specific AutoLISP routines. When you start AutoCAD, it searches the support file search path for an acad.lsp file. If an acad.lsp file is found, it is loaded into memory.

Because the acad.lsp file is intended to be used for application-specific startup routines, all functions and variables defined in an acad.lsp file are only available in the first drawing. You will probably want to move routines that should be available in all documents from your acad.lsp file into the acaddoc.lsp file. Filemaker pro mac free download italiano.

The recommended functionality of acad.lsp and acaddoc.lsp can be overridden with the ACADLSPASDOC system variable. If the ACADLSPASDOC system variable is set to 0 (the default setting), the acad.lsp file is loaded just once: upon application startup. If set to 1, the acad.lsp file is reloaded when a new drawing is created or an existing drawing file is opened.

The acad.lsp file can contain AutoLISP code for one or more routines, or just a series of load function calls. The latter method is preferable, because modification is easier. If you save the following code as an acad.lsp file, the files mysessionapp1.lsp, databasesynch.lsp, and drawingmanager.lsp are loaded every time you start the program.

Note: Do not modify the reserved acad<release>.lsp file. Autodesk provides the acad<release>.lsp file, which contains required, release-specific AutoLISP-defined functions. This file is loaded into memory immediately before the acad.lsp file is loaded. <release> represents the release of the AutoCAD-based product; for example, acad2019.lsp would be the file loaded by AutoCAD 2019-based products.

The ACADDOC.LSP File

The acaddoc.lsp file is intended to be associated with each document (or drawing) initialization. This file is useful if you want to load a library of AutoLISP routines to be available every time you start a new drawing (or open an existing drawing).

Each time a drawing opens, AutoCAD searches the library path for an acaddoc.lsp file. If it finds one, it loads the file into memory. The acaddoc.lsp file is always loaded with each drawing regardless of the settings of ACADLSPASDOC.

How To Write Autocad Lisp Routines

Most users will have a single acaddoc.lsp file for all document-based AutoLISP routines. The program searches for an acaddoc.lsp file in the order defined by the library path; therefore, with this feature, you can have a different acaddoc.lsp file in each drawing directory, which would load specific AutoLISP routines for certain types of drawings or jobs.

The acaddoc.lsp file can contain AutoLISP code for one or more routines, or just a series of load function calls. The latter method is preferable, because modification is easier. If you save the following code as an acaddoc.lsp file, the files mydocumentapp1.lsp, build.lsp, and counter.lsp are loaded every time a new document is opened.

Note: Do not modify the reserved acad<release>doc.lsp file. Autodesk provides the acad<release>doc.lsp file, which contains required, release-specific, AutoLISP-defined functions. This file is loaded into memory immediately before the acaddoc.lsp file is loaded. <release> represents the release of the AutoCAD-based product; for example, acad2019doc.lsp would be the file loaded by AutoCAD 2019-based products.

Free Autocad Lisp Routines

MNL Files and AutoLISP Menu Customization

When the program loads a customization (CUI/CUIx) file, it searches for an MNL file with a matching file name. If it finds the file, it loads the file into memory. This function ensures that the AutoLISP functions that are needed for proper operation of user interface elements are loaded.

For example, the customization file acad.cuix looks for the file acad.mnl which might define numerous AutoLISP functions used by user interface elements in the customization file. The MNL file is loaded after the acaddoc.lsp file.

Note: If a customization file is loaded with the AutoLISP command function—with syntax similar to (command 'menu' 'newmenu')—the associated MNL file is not loaded until the entire AutoLISP routine has run.

In this example, calls to the princ function can be used to display status messages. The first use of princ displays the following at the command prompt:

Autocad Lisp Routine To Insert Block

Newmenu utilities… Loaded.

The second call to princ exits the AutoLISP function. Without this second call to princ, the message would be displayed twice. As mentioned pre