DWG: A drawing-saving format created by AutoCAD, which has become the standard format for two-dimensional CAD. Haochen CAD and many other CADs also directly use DWG as the default working file to be compatible with AutoCAD.
DXF: Another graphics-saving format for CAD, mainly used for data interaction with other software. The saved file can be opened with Notepad to see the various saved graphic data.
DWT: CAD template file, which can load some format settings when creating a new drawing. In addition to the template files provided by CAD, you can also create template files that meet your own needs. You can directly replace the template files that come with CAD, or you can rename them.
DWF: A graphics file format that is exchanged with the network. It can be output using the publishing function or the DWF virtual printer. It cannot be opened with CAD, but it can be viewed with the DWF browser provided by AutoCAD. The DWF reference underlay function is provided in higher versions of AutoCAD and Haochen CAD 2012. DWF can be inserted into drawings as underlays and can be captured to assist in positioning other graphics.
DWL: After opening the drawing file, the machine, user, time, and other information of the opening are recorded. When other people or applications open it, relevant information will be prompted. It is usually opened read-only to ensure that the drawing is not modified and overwritten by two people at the same time. After the drawing file is closed normally, the DWL file is automatically deleted.
MNU, MNC, MNL, and MNS: are menu files used by lower versions of CAD, and higher versions can also be loaded. Among them, MNU is commonly used. It is the source code of the menu and can be edited directly with Notepad. Various professional software and plug-ins usually use MNU files to load menus.
CUI: A custom interface file used by higher versions of CAD. It can be edited in CAD and special tools, but cannot be opened directly with Notepad. Higher versions of AutoCAD and Haochen CAD support such files and CUI files will be automatically generated after loading the MNU file.
SHX: The font file used by CAD such as AutoCAD and Haochen CAD is also called a shape file. Its source code file is *.SHP. It can be customized and compiled into a SHX file in AutoCAD. SHX files are divided into three categories: one is symbolic form, which saves some symbols used for making line types or independent calls; one is ordinary font files, which support letters, numbers, and some single-byte symbols; the other is large font files, supports Chinese, Japanese, Korean and other double-byte characters.
PAT: Fill pattern files used by CAD such as AutoCAD and Haochen CAD. It is a plain text file and can be edited with Notepad. You can write it yourself or copy and paste the collected PAT files into the fill directory or the file of CAD.
LIN: A line-type file used by CAD such as AutoCAD and Haochen CAD. It can define various line types such as dashed, dotted, and dashed lines. You can write plain text files by yourself, and the line types in the collected line type files can be browsed and loaded directly.
SCR: Script file, which can execute save commands in batches to complete drawing work. The plain text file can be edited manually or the operation process can be recorded using the recording script function of CAD. Some professional surveying and mapping software uses scripts to draw cross-section diagrams or some tables.
CTB: Color-related print sample table, which sets the color, line width, and other effects of the print output corresponding to each index color. It is a commonly used file to control print output. CAD usually comes with many preset printing style sheets, including monochrome, grayscale, and color, which can be directly called or simply edited.
STB: Name the print style table, set some print output settings, and set different print styles for different layers. In early versions and some units, it was used more often, but it was rarely used by individuals.
PCP: Print settings file used by older versions.
PC3: Printer and plotter configuration file, which is a file that saves the print driver and related settings in CAD
HDI: The HDI (Heidi® Device Interface) driver is used to communicate with hardcopy devices. These drivers can be divided into three categories: file format drivers, HDI non-system drivers, and HDI system printer drivers.
PLT: Print output file. If you check "Print to file" when using the printer driver, it will not be output directly to the printer, but a PLT file will be generated. This PLT file can be output directly to the printer without CAD. Some design units usually output drawings as PLT files when they are unified or sent to a printing agency to avoid abnormal drawing display and printing caused by missing fonts and version incompatibility.
DWS: Layer standard file, which can save some layer definitions and layer mapping tables, and is mainly used for layer conversion (laytrans). Software such as Haochen CAD does not support this format, but the layer mapping table can be saved as a DWG file with the same effect.
LAS: Layer status file, which can save the switch, freeze, lock, and other states of the set layer, and load and restore the saved state in the current picture or other pictures when needed later.
LSP, DCL, FAS, VLX: The program file of AutoLisp, a secondary development tool for AutoCAD and Haochen CAD. Later, some calls to VBA controls were added and an editor was provided, which is called Visual Lisp (Vlisp). The original LISP program is usually a plain text file, which can be edited with the tools provided by CAD or written directly with Notepad. LISP can be encrypted, and the encrypted extension is considered LSP, but it cannot be opened with Notepad, but it can still be loaded. FAS and VLX are compiled and packaged files
· LSP-ASCII text file containing AutoLISP program code.
· DCL - File for editing dialog boxes used by LSP programs.
· FAS – a binary compiled version of a single LSP program file.
· VLX A compiled set of one or more LSP files and/or Dialog Control Language (DCL) files.
DVB: File generated by AutoCAD for the development tools provided by VB, similar to macros in WORD and EXCEL. Haochen CAD and other software cannot load DVB, but can only load VBI, but the codes are compatible. Enter the VBA editor of the two software, copy the code, and it can be used by simple editing.
ARX: AutoCAD is a development tool provided by C++. Nowadays, some complex programs are usually developed using ARX. ARX programs run more efficiently. Other CADs such as Haochen CAD also provide an interface similar to ARX: GRX. ARX programs are usually compiled and therefore cannot be loaded directly in different versions of CAD.
BAK: Automatically back up files. Usually when saving a file, the last saved file will be modified into BAK format to avoid saving errors. You can directly change BAK to DWG to restore the previous version. AutoCAD and Haochen CAD will generate this file by default. You can set whether to generate this file in the "Open and Save" tab of the "Options" (OP) dialog box.
SV$: Automatically save files. In the "Options" dialog box, you can set the time interval for automatic saving. CAD will automatically save the current drawing according to this interval to prevent exceptions when editing files. SV$ is usually saved in the system's temporary file directory. Of course, it can also be set in the options dialog box. If an abnormal situation occurs, you can use the graphics manager provided by CAD to draw the drawing directly, or directly change the extension of the found file back to DWG to open it. The recovery method for automatically saved files such as Haochen CAD is the same.
AC$: Temporary file, the extension can be set in the "Options" dialog box. When we copy (CTRL+C) or cut (CTRL+V) in CAD, a temporary file will be generated. This temporary file is equivalent to recording the cut. Content can be copied and pasted into other files. Temporary files are usually saved in the current user's temporary folder, but you can also set other paths yourself. If the temporary file path is not writable, copy and paste will not be possible.
ARG: Configuration file. After setting various options in the "Options" dialog box in CAD, it can be output as an *.arg file, so that the configuration can be shared with other people. Some professional software usually uses configuration files to load their related settings.
