/**

	 * Given a subkey of HKEY_LOCAL_MACHINE, and an index (starting from 0)

	 * to the key's array of values, return the name of the indexed value. 

	 * The return value is null on any error or when the index is invalid.

	 * The value name can be used in the above getLocalMachineValue() to retrieve

	 * the value data.

	 * @param subkey   subkey of HKEY_LOCAL_MACHINE

	 * @param index    index to the subkey's array of values, starting from 0. 

	 * @return name of registry value or null if not found

	 */

	public native String getLocalMachineValueName(String subkey, int index);

/*

 * Given a subkey (string) under HKEY_LOCAL_MACHINE, and an index (starting from 0)

 * to the key's array of values, return the name of the indexed value. 

 * The return value is null on any error or when the index is invalid.

 */

extern "C"

JNIEXPORT jstring Java_org_eclipse_cdt_utils_WindowsRegistry_getLocalMachineValueName(

	JNIEnv * env, jobject obj, jstring subkey, jint index)

{

	const jchar * csubkey = env->GetStringChars(subkey, NULL);

	jstring 	result = NULL;

	HKEY key;

	LONG rc = RegOpenKeyEx(HKEY_LOCAL_MACHINE, (const wchar_t *)csubkey, 0, KEY_READ, &key);

	if (rc != ERROR_SUCCESS)

		return NULL;

	wchar_t valueName[256];

	DWORD 	nameSize = sizeof(valueName) + 2;

	rc = RegEnumValue(key, index, 

			valueName, 		// UNICODE string

			&nameSize, 

			NULL, NULL, 

			NULL, 			// data string

			NULL);			// size in BYTE of data.

	if (rc == ERROR_SUCCESS)

	{

		result = env->NewString((jchar *)valueName, nameSize);

	}

	RegCloseKey(key);

	env->ReleaseStringChars(subkey, csubkey);

	return result;

}