watch for a window to appear

[Dj YB]

Hello,

there is a java program that gives me a really hard time, it spawns warning 
messages all the time (making it unusable)
I tried to find a way to disable the warning messages but failed, so I am 
trying to find another way.
I want to close the warning window as it is created.
I got the window name now all I need is to trigger that "close window" when 
the window appear.

using kde 4.4.4 compiz 0.8.6

any suggestions, tips, are welcome.
thanks,
YB.