Parameters
- index
- The index to insert the widget at.
- widget
- The widget to add to the panel.
- grow
- The value to set to the Grow extended property of the widget. If System.Double.NaN, the Grow extended property is not set.
- shrink
- The value to set to the Shrink extended property of the widget. If System.Double.NaN, the Shrink extended property is not set.