Get Min/Max of Destination of Coordinate Transformation.
| call | DclGrid2DGetCoordinateTransform | (cxmin,cxmax,cymin,cymax) | 
| cxmin | <R> | Minumum of 1st. dimemsion coodinate of destination.  | 
  
| cxmax | <R> | Maximum of 1st. dimemsion coodinate of destination. | 
| cymin | <R> | Minumum of 2nd. dimemsion coodinate of destination.  | 
  
| cymax | <R>  | 
    Maximum of 2nd. dimemsion coodinate of destination. | 
Nothing