how to develop a native application in windows environment ?

Answer 1

first you create a class with a native function definition:

public native function();

than compile the Java file and use the javah command, it will generate and H (header) file for you, in the header you will find definition for you native functions, simple implement than in a C/CPP file.
after you are done compile it to a DLL and use the System.loadLibrary("dll_name");

this is a quick explanation, to find out more in depth tutorial search Google for JNI tutorials :)