变量设置
# Undefined Same as UGII_MOUSE_WHEEL=1.
# 0 Disables the mouse wheel in the graphics window. Does not affect its behavior elsewhere
# in Unigraphics NX or in other applications.
# 1 To zoom in, scroll the mouse wheel toward you; To zoom out, scroll away from you. This
# is the default setting.
# 2 To zoom in, scroll the mouse wheel away from you; To zoom out, scroll toward you.
UGII_MOUSE_WHEEL=2