That area is the Toolbar line and you can but controls there by specifying a line number of -1.
For Example:
- multi_line 10,@(0,-1,10,1)
- button 11,@(10,-1,2,1)="{!Bug}",opt="W"[/tt]
The controls, unless defined as
GLOBAL will be considered part of the current window even though they appear in the toolbar. This means they will be deleted when the current window is closed.
Note: that the columns widths assume the toolbar is 80 columns wide unless you set the 'TB' system parameter in which case the toolbar columns/widths will match that of the window layouts.