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This book uses a number of styles and character formats – bold, italic, monotype face, all uppercase or lowercase letters, among others – to help you distinguish between the text you read, sample code you can try, text that you need to enter at the AutoCAD Command prompt, or the name of an object class or method in one of the programming languages.

As you read through this book, keep the following conventions in mind:

• User interface selections are represented by one of the following methods:

• Click Application button ➢ Options.

• On the Ribbon, click Manage tab ➢ Customization ➢ User Interface.

• On the menu bar, click Tools ➢ Customize ➢ Interface.

• In the drawing window, right-click and click Options.

• Keyboard input is shown in bold (for example, type cui and press Enter).

• Prompts that are displayed at the AutoCAD Command prompt are displayed as monospace font (for example, Specify a start point:).

• AutoCAD command, system variable, and AutoLISP function names are displayed in all lowercase letters with a monospace font (for example, line or clayer).

• VBA function and AutoCAD Object library member names are displayed in mixed case letters with a monospace font (for example, Length or SendCommand).

• Example code and code statements that appear within a paragraph are displayed in monospace font. Code samples might look like one of the following:

• (command "._circle" PAUSE 3)

• MsgBox "ObjectName: " & oFirstEnt.ObjectName

• The MsgBox method can be used to display a text message to the user

• ' Gets the first object in model space