Which library file contains all the registered application in win98/win2000

Hi:

Can anyone tell me which file contains all the registered application signature in win98/win200. I am using java to develop an application to open a file in windows system according to the file's extension. For instance, to open a file abc.doc use winword, to open a file abc.xls use excel etc. I know that there's a library file contains all these info., what's the file name, how can i use it. (ie. use what method call to get the associated application name/path according to the file extension).

Thanks very much in advance.

[579 byte] By [stanley.lam@usa.net] at [2007-9-26 2:01:28]