DclSetViewPort

Set view port.

Call

DclSetViewPort

([Xmin], [xmax], [ymin], [ymax])

Xmin, xmax	< R >	The biggest minimum value of the x direction of a view port.
Ymin, ymax	< R >	The biggest minimum value of the y direction of a view port.

Value that did Setting here be DclSetTransFunction By calling it becomes effective.