Computer-aided design (CAD) is the use of a wide range of computer-based tools that assist engineers, architects and other design professionals in their design activities. It is the main geometry authoring tool within the Product Lifecycle Management process and involves both software and sometimes special-purpose hardware. Current packages range from 2D vector based drafting systems to 3D solid and surface modellers.
CAD is sometimes translated as "computer-assisted", "computer-aided drafting", or a similar phrase. Related acronyms are CADD, which stands for "computer-aided design and drafting", CAID for Computer-aided Industrial Design and CAAD, for "computer-aided architectural design". All these terms are essentially synonymous, but there are some subtle differences in meaning and application.
Sub Box()
Dim dOrigin(0 to 2) As Double
Dim dLength As Double
Dim dWidth As Double
Dim dHeight As Double
Dim myBox As Acad3DSolid
dOrigin(0)=0#
dOrigin(1)=0#
dOrigin(2)=0#
dLength=5#
dWidth=5#
dHeight=5#
Set myBox=ThisDrawing.ModelSpace.AddBox(dOrigin,dLength,dWidth,dHeight)
ThisDrawing.SendCommand("VPOINT 1,1,1 ")
End Sub