>Is it possible to have a grid view of two tables 'OrderMaster' and 'OrderDetails' together in the same grid one bellow the other, each row with the cells of the particular table

You can display "almost everything" in a grid, as long as you can get it into a cursor, or at least derive from cursor content.
In my opinion, it's not always useful to do so, though.
How do you want it to display?

CREATE CURSOR OrderMaster (orderNo Char(10), orderDate D)
INSERT INTO OrderMaster VALUES ("27001", DATE(2003,11,2))
CREATE CURSOR OrderDetails (quantity Int, price Num(18,2))
INSERT INTO OrderDetails VALUES (5, 20.5)

SELECT orderNo as Column1, CAST(orderDate as Char(20)) as Column2 FROM orderMaster;
UNION ;
select CAST(quantity as Char(10)), CAST(price As Char(20)) FROM orderDetails ;
Into Cursor gridSource

hth
-Stefan