ActiveX and VBA
Developer's Guide > Create and Edit
AutoCAD Entities > Use Layers, Colors,
and Linetypes > Work with
Layers >
Make a Layer Active
You are always drawing on the active layer. When you make a layer active, you can create new objects on that layer. If you make a different layer active, any new objects you create are created on that new active layer and use its color and linetype. You cannot make a layer active if it is frozen.
To make a layer active, use the ActiveLayer property. This property is set on the current drawing. For example:
Dim newlayer As AcadLayer
Set newlayer = ThisDrawing.Layers.Add("LAYER1")
ThisDrawing.ActiveLayer = newlayer
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