Returns the obliquing angle in range ±1.48335 radians (±85°) (DXF 50). This angle influences on the lean of letters. Negative angles will have Oda2PI added to them.

Example of Working with the Text Style Record Object 

Specific Properties of Text Styles 

OdDbTextStyleTableRecord::setObliquingAngle() method

OdDbTextStyleTableRecord Methods