#include "HelloWorld.h" 
#include <windows.h> 

JNIEXPORT void JNICALL Java_HelloWorld_print(JNIEnv *env, jclass cl, jstring s) 
{ 
  const char *c = (*env)->GetStringUTFChars(env, s, NULL); 
  if (c) 
  { 
    MessageBox(NULL, c, "JNI Message", MB_OK); 
    (*env)->ReleaseStringUTFChars(env, s, c); 
  } 
}