Auto Complete,AutoScale,AutoSize Mode

AutoComplete Mode:
AutoComplete Mode is only for ComboBox and Text Box.
AutoScale Mode:
Default AutoScale Mode  is "Font"It is only for Form.
AutoSize Mode:
 Grow Only: Manually,you can change size of the Control when Auto size is enable.
 Grow and Shrink:Manually,you can't change size of the Control when Auto size is enable.