I am typing in this code from a book I got and I am typing it in exactly. I have linked to everything correctly like it says and it keeps giving me one error: unreferenced external symbol "IID_IDirectDraw4" here is the code: // DEMO6_1.CPP basic DirectDraw initialization demo // INCLUDES /////////////////////////////////////////////// #define WIN32_LEAN_AND_MEAN // just say no to MFC #include // include important windows stuff #include #include #include // include important C/C++ stuff #include #include #include #include #include #include #include #include #include #include #include // include directdraw // DEFINES //////////////////////////////////////////////// // defines for windows #define WINDOW_CLASS_NAME "WINCLASS1" // TYPES ////////////////////////////////////////////////////// // MACROS ///////////////////////////////////////////////// #define KEYDOWN(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 1 : 0) #define KEYUP(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 0 : 1) // initializes a direct draw struct // GLOBALS //////////////////////////////////////////////// HWND main_window_handle = NULL; // globally track main window HINSTANCE hinstance_app = NULL; // globally track hinstance // directdraw stuff LPDIRECTDRAW lpdd = NULL; // dd object LPDIRECTDRAW4 lpdd4 = NULL; // dd4 object char buffer[80]; // general printing buffer // FUNCTIONS ////////////////////////////////////////////// LRESULT CALLBACK WindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam) { // this is the main message handler of the system PAINTSTRUCT ps; // used in WM_PAINT HDC hdc; // handle to a device context // used to print strings // what is the message switch(msg) { case WM_CREATE: { // do initialization stuff here // return success return(0); } break; case WM_PAINT: { // simply validate the window hdc = BeginPaint(hwnd,&ps); // end painting EndPaint(hwnd,&ps); // return success return(0); } break; case WM_DESTROY: { // kill the application, this sends a WM_QUIT message PostQuitMessage(0); // return success return(0); } break; default:break; } // end switch // process any messages that we didn''t take care of return (DefWindowProc(hwnd, msg, wparam, lparam)); } // end WinProc /////////////////////////////////////////////////////////// int Game_Main(void *parms = NULL, int num_parms = 0) { // this is the main loop of the game, do all your processing // here // for now test if user is hitting ESC and send WM_CLOSE if (KEYDOWN(VK_ESCAPE)) SendMessage(main_window_handle,WM_CLOSE,0,0); // return success or failure or your own return code here return(1); } // end Game_Main //////////////////////////////////////////////////////////// int Game_Init(void *parms = NULL, int num_parms = 0) { // this is called once after the initial window is created and // before the main event loop is entered, do all your initialization // here // first create base IDirectDraw interface if (FAILED(DirectDrawCreate(NULL, &lpdd, NULL))) { // error return(0); } // end if // now query for IDirectDraw4 if (FAILED(lpdd->QueryInterface(IID_IDirectDraw4, (LPVOID *)&lpdd4))) { // error return(0); } // end if // set cooperation to normal since this will be a windowed app lpdd4->SetCooperativeLevel(main_window_handle, DDSCL_NORMAL); // return success or failure or your own return code here return(1); } // end Game_Init ///////////////////////////////////////////////////////////// int Game_Shutdown(void *parms = NULL, int num_parms = 0) { // this is called after the game is exited and the main event // loop while is exited, do all you cleanup and shutdown here // simply blow away the IDirectDraw4 interface if (lpdd4) { lpdd4->Release(); lpdd4 = NULL; } // end if // return success or failure or your own return code here return(1); } // end Game_Shutdown // WINMAIN //////////////////////////////////////////////// int WINAPI WinMain( HINSTANCE hinstance, HINSTANCE hprevinstance, LPSTR lpcmdline, int ncmdshow) { WNDCLASSEX winclass; // this will hold the class we create HWND hwnd; // generic window handle MSG msg; // generic message HDC hdc; // graphics device context // first fill in the window class stucture winclass.cbSize = sizeof(WNDCLASSEX); winclass.style = CS_DBLCLKS / CS_OWNDC / CS_HREDRAW / CS_VREDRAW; winclass.lpfnWndProc = WindowProc; winclass.cbClsExtra = 0; winclass.cbWndExtra = 0; winclass.hInstance = hinstance; winclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); winclass.hCursor = LoadCursor(NULL, IDC_ARROW); winclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); winclass.lpszMenuName = NULL; winclass.lpszClassName = WINDOW_CLASS_NAME; winclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION); // save hinstance in global hinstance_app = hinstance; // register the window class if (!RegisterClassEx(&winclass)) return(0); // create the window if (!(hwnd = CreateWindowEx(NULL, // extended style WINDOW_CLASS_NAME, // class "DirectDraw Initialization Demo", // title WS_OVERLAPPEDWINDOW / WS_VISIBLE, 0,0, // initial x,y 400,300, // initial width, height NULL, // handle to parent NULL, // handle to menu hinstance,// instance of this application NULL))) // extra creation parms return(0); // save main window handle main_window_handle = hwnd; // initialize game here Game_Init(); // enter main event loop while(TRUE) { // test if there is a message in queue, if so get it if (PeekMessage(&msg,NULL,0,0,PM_REMOVE)) { // test if this is a quit if (msg.message == WM_QUIT) break; // translate any accelerator keys TranslateMessage(&msg); // send the message to the window proc DispatchMessage(&msg); } // end if // main game processing goes here Game_Main(); } // end while // closedown game here Game_Shutdown(); // return to Windows like this return(msg.wParam); } // end WinMain /////////////////////////////////////////////////////////// I have linked to everything correctly and it still gives me one error, please help!!!!

Are you POSITIVE that you''re linking to everything correctly? It sounds to me like you might be forgetting to link ddraw.lib and/or dxguid.lib. It''s under Project / Settings in VC++ 6. If you already have them, try putting them first if they aren''t already.

Other than that, I don''t know why you''d be having a problem. Assuming you''re including ddraw.h (which doesn''t show up due to the HTML nature of the board) you shouldn''t have any problems.

it was because i wasnt linking to dxguid.lib, the book didn''t tell me to link to that so i thought i linked to everything thanx a lot jaxson