Gets the number of detantes the mouse wheel has been moved multiplied by 120
A shift of the scroll wheel is called a detante. Please note that windows by default returns the number of detantes moved multiplied by 120. This means that a Delta value of 120 means that the mouse moveed up one Detante. -240 means the mouse moved down two detantes.
C# Eg., int iDetantesMoved = e.Delta / 120;