WBLOCK — Write Block

Writes a block to a DWG or DXF drawing file.

Command: WBLOCK · Global name: _WBLOCK · Alias: W, ACADWBLOCKDIALOG
Ribbon: Insert › Block
Menu: Insert

Saves a block, the whole drawing or some objects as a new DWG or DXF drawing, to use it in other drawings or in a library folder.

Usage

Enter WBLOCK (or W) or click the button. Objects already selected are used as a starting point.
In the Write Block dialog box, choose the source: - Block: one of the blocks of the drawing. - Entire drawing: the whole model space. - Objects: the base point (coordinates or Specify On-screen) and the objects (the selected ones or, with Specify On-screen, those you select after OK), and whether they are retained, converted to a block (a block of the drawing named like the file) or deleted.
Enter the file name and path (or browse with …) and click OK.

In scripts, SCRIPT and AutoLISP there is no dialog box: everything is asked on the command line, as in -WBLOCK.

The contents go to the model space of the new drawing, with the layers, linetypes, styles and nested blocks they use. The base point becomes the drawing's base point (INSBASE).
The file is saved in the version of the current drawing (DWG 2018 if the current one is older than 2000). If it already exists, it is replaced and a .bak copy is left.
As in AutoCAD, the file only carries the blocks, layers, linetypes and styles it uses (the rest is purged, as with PURGE).
To insert the file into another drawing, enter its path in -INSERT or use Browse… in the INSERT palette. The dialog box cannot be scripted in the AutoCAD console: it has a unit test.