Using Programming Languages other than VBA

Sub Example_AltUnitsPrecision()
   ' This example creates an aligned dimension in model space and
   ' uses AltUnitsPrecision to allow the user to change the
   ' precision of the alternate dimension

	Dim dimObj As AcadDimAligned
	Dim point1(0 To 2) As Double, point2(0 To 2) As Double
	Dim location(0 To 2) As Double
	Dim oldPrecision As String, newPrecision As String

	' Define the dimension
	point1(0) = 0: point1(1) = 5: point1(2) = 0
	point2(0) = 5.12345678: point2(1) = 5: point2(2) = 0
	location(0) = 5: location(1) = 7: location(2) = 0

	' Create an aligned dimension object in model space
	Set dimObj = ThisDrawing.ModelSpace.AddDimAligned(point1, point2, location)

	' Enable alternate unit display
	dimObj.AltUnits = True

	ThisDrawing.Application.ZoomAll

	' Store old Precision value as default for input box
	oldPrecision = dimObj.AltUnitsPrecision

	' Allow the user to change the precision for the alternate dimension
	newPrecision = InputBox("Enter a new precision for the alternate dimension.  The value must range from 0 to 8.", "Alternate Dimension Precision", oldPrecision)

	Select Case newPrecision
		Case 0: newPrecision = acDimPrecisionZero
		Case 1: newPrecision = acDimPrecisionOne
		Case 2: newPrecision = acDimPrecisionTwo
		Case 3: newPrecision = acDimPrecisionThree
		Case 4: newPrecision = acDimPrecisionFour
		Case 5: newPrecision = acDimPrecisionFive
		Case 6: newPrecision = acDimPrecisionSix
		Case 7: newPrecision = acDimPrecisionSeven
		Case 8: newPrecision = acDimPrecisionEight
		Case Else
			MsgBox "The alternate precision has not been changed."
			Exit Sub
	End Select

	dimObj.AltUnitsPrecision = newPrecision   ' Commit changes to precision

	ThisDrawing.Regen acAllViewports

	' Read back and display the alternate dimension precision
	newPrecision = dimObj.AltUnitsPrecision
	MsgBox "The alternate dimension precision has been set to " & newPrecision & " decimal places"
End Sub