Invoking FoxPro DLL functions from Java

Hi,
I have a foxpro DLL called as X.DLL. This x.dll is generated from foxpro database. It has three functions which i need to call it from my java code.
After lot of researching i found that
to invoke a DLL from java i need to create one more DLL like Y.DLL using C/C++

Steps that i followed.
1. Wrote a java Y.java class that loads Y.DLL(Y.DLL doesnt exist now) and declared three native methods.
2. Compiled and generated Y.h file
3. Wrote a Y.c file importing Y.h and implementing native methods with a simple printf statement.
4. Generated a Y.DLL using cygwin\mingw

But i am not understanding where am i refering to X.dll ? which is my target.

Few said that i can invoke only C/C++ DLL's from java? is it true?
Few said that i should have a X.h file in hand so that i can import it in Y.c to call methods. I dont have this X.h file
I am also confused that whether i need to load X.dll or Y.dll in Step 1 that i have mentioned above.
Could anyone please help me. Where am i going wrong? Please help me understand.

thanks in advance