Make a Layer Active
Work with Layers
Freeze and Thaw Layers
Turned-off layers are regenerated with the drawing but are not displayed or plotted. By turning layers off, you avoid regenerating the drawing every time you thaw a layer. When you turn a layer on that has been turned off, AutoCAD redraws the objects on that layer.
To turn layers on and off, use the LayerOn property. If you input a value of TRUE to this property, the layer is turned on. If you input a value of FALSE, the layer is turned off.
This example creates a new layer, adds a circle to the layer, then turns off the layer so that the circle is no longer visible.
Sub Ch4_LayerInvisible()
' Create a circle
Dim circleObj As AcadCircle
Dim center(0 To 2) As Double
Dim radius As Double
center(0) = 2: center(1) = 2: center(2) = 0
radius = 1
Set circleObj = ThisDrawing.ModelSpace. _
AddCircle(center, radius)
' Create a new layer called "ABC"
Dim layerObj As AcadLayer
Set layerObj = ThisDrawing.Layers.Add("ABC")
' Assign the circle to the "ABC" layer
circleObj.Layer = "ABC"
circleObj.Update
' Turn off layer "ABC"
layerObj.LayerOn = False
ThisDrawing.Regen acActiveViewport
End Sub