Using Programming Languages other than VBA

Sub Example_TextRotation()
	' This example creates an aligned dimension and then changes the
	' TextRotation property for that dimension.

	Dim dimObj As AcadDimAligned
	Dim point1(0 To 2) As Double
	Dim point2(0 To 2) As Double
	Dim location(0 To 2) As Double

	' Define the dimension
	point1(0) = 5#: point1(1) = 3#: point1(2) = 0#
	point2(0) = 10#: point2(1) = 3#: point2(2) = 0#
	location(0) = 7.5: location(1) = 5#: location(2) = 0#

	' Create an aligned dimension object in model space
	Set dimObj = ThisDrawing.ModelSpace.AddDimAligned(point1, point2, location)
	ZoomAll
	MsgBox "The current text rotation angle for the dimension is " & dimObj.TextRotation & " radians.", vbInformation, "TextRotation Example"

	' Change the text rotation angle to 45 degrees (.707 radians)
	dimObj.TextRotation = 0.707
	dimObj.Update
	
	MsgBox "The new text rotation angle for the dimension is " & dimObj.TextRotation & " radians.", vbInformation, "TextRotation Example"
End Sub