Procedure Window (X1, Y1, X2, Y2: Byte) ;
Window creates a window on the screen, to which output will be sent. (X1,Y1) are the coordinates of the upper left corner of the window, (X2,Y2) are the coordinates of the bottom right corner of the window. These coordinates are relative to the entire screen, with the top left corner equal to (1,1)
Further coordinate operations, except for the next Window call, are relative to the window's top left corner.
None.
GotoXY, WhereX, WhereY, ClrScr