ActiveX and VBA Developer's Guide > Control the AutoCAD Environment > Draw with Precision > Draw Construction Lines > 
Create Construction XLines
 
 
 

A construction xline can be placed anywhere in 3D space and extends to infinity in both directions. To create an xline, use the AddXLine method. This method specifies the line by the two-point method; you enter or select two points to define the orientation. The first point, the root, is considered the midpoint of the construction line.

Add a construction line

The following example code creates an XLine object using the two points (5, 0, 0) and (1, 1, 0).

Sub Ch3_AddXLine()

	Dim xlineObj As AcadXline

	Dim basePoint(0 To 2) As Double

	Dim directionVec(0 To 2) As Double




	' Define the xline




	basePoint(0) = 2#: basePoint(1) = 2#: basePoint(2) = 0#




	directionVec(0) = 1#: directionVec(1) = 1#: directionVec(2) = 0#







	' Create the xline in model space




	Set xlineObj = ThisDrawing.ModelSpace.AddXLine _




				 (basePoint, directionVec)




	ThisDrawing.Application.ZoomAll




End Sub