Complex problem using Netbeans IDE

Hi

Consider these these links of mine:

MDI in NETbeans
http://www.vbforums.com/showthread.php?t=536623

Maximizing in Netbeans
http://www.vbforums.com/showthread.php?t=537759

And
http://www.vbforums.com/showthread.php?t=538017

Actually I was designing in 5.1 ver
All of my queries were answered in using ver 6
But the problem is if I use internal frames in It as I like my Application to be MDI the internal forms have no button to be closed neither I can figure out any event to generate them like on some button.
Nor I can figure out how to set them feel decorated as you can see using this example

MDI in NETbeans
http://www.vbforums.com/showthread.php?t=536623

The ver 6 gives an entirely different concept of Netbeans IDE windows applications

I tried it on netbeans.org but in vain
Please help me out I just want internal frames in GUI apllications of Netbeans IDE 6.0 with the ability to be generate on an event and are able to be close down