LPDIRECTINPUT8       g_pDI              = NULL;         LPDIRECTINPUTDEVICE8 g_pJoystick        = NULL;// callback function for IDirectInput8::EnumDevicesBOOL CALLBACK EnumJoysticksCallback( const DIDEVICEINSTANCE* pdidInstance,VOID* pContext ){   HRESULT hr;    // Obtain an interface to the enumerated joystick.    hr = g_pDI->CreateDevice( pdidInstance->guidInstance, &g_pJoystick, NULL );    // If it failed, then we can't use this joystick. (Maybe the user unplugged    // it while we were in the middle of enumerating it.)    if( FAILED(hr) )         return DIENUM_CONTINUE;    // Stop enumeration. Note: we're just taking the first joystick we get. You    // could store all the enumerated joysticks and let the user pick.    return DIENUM_STOP;}// direct input initializationvoid InitDirectInput(){  HRESULT hr;  // Create the IDirectInput8 interface  V( DirectInput8Create(  GetModuleHandle( NULL ),     DIRECTINPUT_VERSION,    IID_IDirectInput8,    (LPVOID*)&g_pDI,    NULL  ) );  // Look for a simple joystick  V( g_pDI->EnumDevices( DI8DEVCLASS_GAMECTRL,      EnumJoysticksCallback,     NULL, DIEDFL_ATTACHEDONLY ) );  	if ( g_pJoystick == NULL )		return;  // initialize the joystick here (app specific).  // do other direct input inititialization here.}