Control.setStyle method
protected void setStyle(ControlStyles flag, bool value)
Set or unset, based on if value is true or false, respectively, the control's styles specified by flag.
In the following example, the styles CACHE_TEXT and OPAQUE are set to true:
this.setStyle(ControlStyles.CACHE_TEXT | ControlStyles.OPAQUE, true);
See also: ControlStyles, getStyle