Changing size in Java applet

[Karl-Albrecht Klinge]

Hi everybody,

we are using a java applet.

we can change size and we are dynamically zooming with rectangles.

(1) How can we get information about the map extent of the returned map
e.g. minX, minY, maxX, maxY?

(2) We have the cgi-reference.
It does not give us any information about what combinations of
parameters make up a possible request.

(3) How can we use the 'post'-request?
The script returns "null The script can only be used to decode form
results." 
what ever this means

Thanks in advance,

Karl