How to craete dll files

I want to create dll files in j2sdk1.4
could anyone please tell me waht is the use of dll and how to create them.

Hi Can you be more descriptive on this like
I want to create dll files in j2sdk1.4In the sence you want to create a .dll file using java or you want make your java code as .dll file or what else...?
could anyone please tell me waht is the use of dll
and how to create them.google in MSDN forums for best results
and also can you tell me what is your exact problem or what you want to do exactly ....
---Vidya

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