[Dev-C++] DLL

Hi to the list users,
 
I am trying to make a dll with the function below.
I gess this is the kind of thing it is asking for -eMyClass.dll ?
 
It creates a 20K dll witch does not work.
I am using Borland meanwhile. with:
C:\Borland\BCC55\Bin\bcc32.exe  -c -I%include_path% -oMyClass.obj
MyClass.c
C:\Borland\BCC55\Bin\bcc32.exe  -tWD -eMyClass.dll MyClass.obj
 
 
Where can I learn about DEVC++ on this?
 
> dllwrap.exe: no export definition file provided.
> Creating one, but that may not be what you want
 
--------------
#include "MyClass.h"
 
JNIEXPORT void JNICALL Java_MyClass_JumpElse( JNIEnv *env, jobject jThis
) {
  jclass cls;
  jfieldID champ;
  jint luku;
  jchar jch;
  const char *c_ch;
 
  cls = (*env)->GetObjectClass(env, jThis );
/*  champ = (*env)->GetStaticFieldID(env, cls, "number", "I" );
  luku = (*env)->GetStaticIntField(env, cls, champ );
  printf("%d\n", luku);*/
  
  champ = (*env)->GetStaticFieldID( env, cls,
"name","Ljava/lang/String");
  
  jch = (*env)->GetStaticObjectField(env, cls, champ);
  c_ch = (*env)->GetStringUTFChars(env, jch, NULL);
 
  printf("%s\n", c_ch);
}