Font :: weight - Weight property
We use a weighting scale from 0 to 99. A weight of 0 is ultralight, 99 will be black. Suggested weights are:
- Light - 25
 - Normal - 50
 - DemiBold - 63
 - Bold - 75
 - Black - 87
 
Options.GUIFramework.Fonts._std_font.weight=75
Return value:   - internal feature ( int32  )
Implementation overview
- Get font weight
Font :: weight (  ) - Change font weight value
Font :: weight ( iNumber ) 

