Specifies the oblique angle of the object.
Supported platforms: Windows only
VBA:
object.ObliqueAngle
Type: Attribute, AttributeReference, Shape, Text, TextStyle
The objects this property applies to.
Read-only: No
Type: Double
The angle in radians within the range of -85 to +85 degrees. A positive angle denotes a lean to the right; a negative value will have 2*PI added to it to convert it to its positive equivalent.
The oblique angle is the object's "angle of slant" away from its vertical axis.

VBA:
Sub Example_ObliqueAngle()
' This example creates a text object in model space.
' It then changes the ObliqueAngle of the text object.
Dim textObj As AcadText
Dim textString As String
Dim insertionPoint(0 To 2) As Double
Dim height As Double
' Define the text object
textString = "Hello, World."
insertionPoint(0) = 3: insertionPoint(1) = 3: insertionPoint(2) = 0
height = 0.5
' Create the text object in model space
Set textObj = ThisDrawing.ModelSpace.AddText(textString, insertionPoint, height)
ZoomAll
MsgBox "The ObliqueAngle is " & textObj.ObliqueAngle, vbInformation, "ObliqueAngle Example"
' Change the value of the ObliqueAngle to 45 degrees (.707 radians)
textObj.ObliqueAngle = 0.707
ZoomAll
MsgBox "The ObliqueAngle is set to " & textObj.ObliqueAngle, vbInformation, "ObliqueAngle Example"
End Sub
Visual LISP:
(vl-load-com)
(defun c:Example_ObliqueAngle()
;; This example creates a text object in model space.
;; It then changes the ObliqueAngle of the text object.
(setq acadObj (vlax-get-acad-object))
(setq doc (vla-get-ActiveDocument acadObj))
;; Define the text object
(setq insertionPoint (vlax-3d-point 3 3 0)
textString "Hello, World."
height 0.5)
;; Create the text object in model space
(setq modelSpace (vla-get-ModelSpace doc))
(setq textObj (vla-AddText modelSpace textString insertionPoint height))
(vla-ZoomAll acadObj)
(alert (strcat "The ObliqueAngle is " (rtos (vla-get-ObliqueAngle textObj) 2)))
;; Change the value of the ObliqueAngle to 45 degrees (.707 radians)
(vla-put-ObliqueAngle textObj 0.707)
(vla-ZoomAll acadObj)
(alert (strcat "The ObliqueAngle is set to " (rtos (vla-get-ObliqueAngle textObj) 2)))
)