🚀 go-pugleaf

Hi,
I have a c dll (MyDll) stdcall fnc as follows.
stdcall int MyFnc(int FileNo, int IOType, unsigned char * DataToWrite, unsigned char *  DataRead);

I try to call from java code, but it gives me an error as follows.

Exception in thread "main" java.lang.UnsatisfiedLinkError: Myfunc
        at X.MyFnc(Native Method)
        at X.main(X.java:6)

My java code is:

class X {
  private native int MyFunc(int fileNo, int IOType, byte[] DataToWrite, byte[] DataRead);
  public static void main(String args[]) {
    X p = new X();
    byte[] c= new byte[512];
    byte[] c2= new byte[512];
    int result = p.MyFunc(1,0,c,c2);
    System.out.println(result);
  }
  static {
    System.loadLibrary("MyDll");
  }
}

Any idea ?
Thanks in advance
yc