Returns basic information about a window.
group window_info(window_name | value)
Window_info takes a single parameter, either the window name or id, and
returns information about that window. The values are returned using the
TRIMpl group format. The window does not have to be opened before calling
Currently there are four return values:
window-name|| specifies the window by name.
value|| specifies the window by sequence number.
- Rows per row
- Row count
- Number of fields
- Window attributes
[rpr,rct,nfl,wat] = window_info(W1);
[rpr] = window_info(W2);