problem displaying image

I just started learning windows programming with forger's tutorial, but I'm stck on the bitmap part. It keeps giving me errors:

In function 'Z7WndProcP6HWND_jjl'
[Linker error] undefined reference to 'DeleteObject@4'
[Linker error] undefined reference to ...
etc.

im using dev c++ and windows xp

main.cpp

Code:

---

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

const char g_szClassName[] = "myWindowClass";

BOOL CALLBACK AboutDlgProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
    switch(Message)
    {
        case WM_INITDIALOG:

        return TRUE;
        case WM_COMMAND:
            switch(LOWORD(wParam))
            {
                case IDOK:
                    EndDialog(hwnd, IDOK);
                break;
                case IDCANCEL:
                    EndDialog(hwnd, IDCANCEL);
                break;
            }
        break;
        default:
            return FALSE;
    }
    return TRUE;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    HBITMAP g_hbmBall = NULL;
    switch(msg)
    {
        case WM_LBUTTONDOWN:
        {
            char szFileName[MAX_PATH];
            HINSTANCE hInstance = GetModuleHandle(NULL);

            GetModuleFileName(hInstance, szFileName, MAX_PATH);
            MessageBox(hwnd, szFileName, "This program is:", MB_OK | MB_ICONINFORMATION);
        }
        break;
       
        case WM_CLOSE:
            DestroyWindow(hwnd);
        break;
       
        case WM_DESTROY:
            DeleteObject(g_hbmBall);
            PostQuitMessage(0);
        break;
       
        case WM_CREATE:
        {
            HMENU hMenu, hSubMenu;
            HICON hIcon, hIconSm;
   
            hMenu = CreateMenu();
   
            hSubMenu = CreatePopupMenu();
            AppendMenu(hMenu, MF_STRING | MF_POPUP, (UINT)hSubMenu, "&File");
            AppendMenu(hSubMenu, MF_STRING, ID_FILE_EXIT, "E&xit");
   
            hSubMenu = CreatePopupMenu();
            AppendMenu(hMenu, MF_STRING | MF_POPUP, (UINT)hSubMenu, "&Stuff");
            AppendMenu(hSubMenu, MF_STRING, ID_STUFF_GO, "&Go");
            AppendMenu(hSubMenu, MF_STRING, ID_STUFF_GSE, "G&o somewhere else");
           
            hSubMenu = CreatePopupMenu();
            AppendMenu(hMenu, MF_STRING | MF_POPUP, (UINT)hSubMenu, "&Howard");
            AppendMenu(hSubMenu, MF_STRING, ID_DEATH, "&Die");
           
            hSubMenu = CreatePopupMenu();
            AppendMenu(hMenu, MF_STRING | MF_POPUP, (UINT)hSubMenu, "&Help");
            AppendMenu(hSubMenu, MF_STRING, ID_HELP_ABOUT, "&About");
   
            SetMenu(hwnd, hMenu);
   
   
            hIcon = (HICON)LoadImage(NULL, "h.ico", IMAGE_ICON, 32, 32, LR_LOADFROMFILE);
            if(hIcon)
                SendMessage(hwnd, WM_SETICON, ICON_BIG, (LPARAM)hIcon);
            else
                MessageBox(hwnd, "Could not load large icon!", "Error", MB_OK | MB_ICONERROR);
   
            hIconSm = (HICON)LoadImage(NULL, "h.ico", IMAGE_ICON, 16, 16, LR_LOADFROMFILE);
            if(hIconSm)
                SendMessage(hwnd, WM_SETICON, ICON_SMALL, (LPARAM)hIconSm);
            else
                MessageBox(hwnd, "Could not load small icon!", "Error", MB_OK | MB_ICONERROR);
               
            g_hbmBall = LoadBitmap(GetModuleHandle(NULL), MAKEINTRESOURCE(IDB_BALL));
            if(g_hbmBall == NULL)
                MessageBox(hwnd, "Could not load IDB_BALL!", "Error", MB_OK | MB_ICONEXCLAMATION);
        }
        break;
       
        case WM_PAINT:
        {
            BITMAP bm;
            PAINTSTRUCT ps;
   
            HDC hdc = BeginPaint(hwnd, &ps);
   
            HDC hdcMem = CreateCompatibleDC(hdc);
            HBITMAP hbmOld = (HBITMAP)SelectObject(hdcMem, g_hbmBall);
   
            GetObject(g_hbmBall, sizeof(bm), &bm);
   
            BitBlt(hdc, 0, 0, bm.bmWidth, bm.bmHeight, hdcMem, 0, 0, SRCCOPY);
   
            SelectObject(hdcMem, hbmOld);
            DeleteDC(hdcMem);
   
            EndPaint(hwnd, &ps);
        }
        break;
       
        case WM_COMMAND:
            switch(LOWORD(wParam))
            {
                case ID_FILE_EXIT:
                {
                    int ret = MessageBox(hwnd, "Are you sure you want to exit?", "menu", MB_OKCANCEL);
                    if (ret == IDOK)
                        DestroyWindow(hwnd);
                }
                break;
                case ID_STUFF_GO:
                    MessageBox(hwnd, "Stuff -> Go", "menu", MB_OK);
                break;
                case ID_STUFF_GSE:
                    MessageBox(hwnd, "Stuff -> Go Somewhere Else", "menu", MB_OK);
                break;
                case ID_DEATH:
                    MessageBox(hwnd, "Howard -> Death", "menu", MB_OK);
                break;
                case ID_HELP_ABOUT:
                    DialogBox(GetModuleHandle(NULL), MAKEINTRESOURCE(IDD_ABOUT), hwnd, AboutDlgProc);
                break;
                   
            }
        break;
       
        default:
            return DefWindowProc(hwnd, msg, wParam, lParam);
    }
    return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    LPSTR lpCmdLine, int nCmdShow)
{
    WNDCLASSEX wc;
    HWND hwnd;
    MSG Msg;

    wc.cbSize        = sizeof(WNDCLASSEX);
    wc.style        = 0;
    wc.lpfnWndProc  = WndProc;
    wc.cbClsExtra    = 0;
    wc.cbWndExtra    = 0;
    wc.hInstance    = hInstance;
    wc.hIcon        = LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_MYICON));
    wc.hCursor      = LoadCursor(NULL, "15.cur");
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
    wc.lpszMenuName  = MAKEINTRESOURCE(IDR_MYMENU);
    wc.lpszClassName = g_szClassName;
    wc.hIconSm      = (HICON)LoadImage(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_MYICON), IMAGE_ICON, 16, 16, 0);

    if(!RegisterClassEx(&wc))
    {
        MessageBox(NULL, "Window Registration Failed!", "Error!",
            MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }

    hwnd = CreateWindowEx(
        WS_EX_CLIENTEDGE,
        g_szClassName,
        "The title of my window",
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT, 240, 120,
        NULL, NULL, hInstance, NULL);

    if(hwnd == NULL)
    {
        MessageBox(NULL, "Window Creation Failed!", "Error!",
            MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }

    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

    while(GetMessage(&Msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&Msg);
        DispatchMessage(&Msg);
    }
    return Msg.wParam;
}

---

resource.h

Code:

---

#define IDC_CURSOR 011
#define IDR_MYMENU 101
#define IDI_MYICON 201

#define IDD_ABOUT 301

#define ID_FILE_EXIT 9001
#define ID_STUFF_GO 9002
#define ID_STUFF_GSE 9003
#define ID_DEATH 9004
#define IDC_STATIC 9005
#define ID_HELP_ABOUT 9006

#define IDB_BALL 9007

---

resource.rc

Code:

---

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

IDI_MYICON ICON "h.ico"

IDC_CURSOR CURSOR "15.cur"

IDB_BALL BITMAP "image.bmp"

IDR_MYMENU MENU
{
        POPUP "&File"
        {
              MENUITEM "E&xit", ID_FILE_EXIT
        }
        POPUP "&Stuff"
        {
              MENUITEM "&Go", ID_STUFF_GO
              MENUITEM "G&o somewhere else", ID_STUFF_GSE
        }
        POPUP "&Howard"
        {
              MENUITEM "&Die", 0, GRAYED
        }
        POPUP "&Help"
        {
              MENUITEM "&About", ID_HELP_ABOUT
        }
}

IDD_ABOUT DIALOG DISCARDABLE  0, 0, 239, 66
STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
CAPTION "My About Box"
FONT 8, "MS Sans Serif"
{
    DEFPUSHBUTTON  "&OK",IDOK,174,18,50,14
    PUSHBUTTON      "&Cancel",IDCANCEL,174,35,50,14
    GROUPBOX        "About this program...",IDC_STATIC,7,7,225,52
    CTEXT          "An example program showing how to use Dialog Boxes\r\n\r\nEdited by Howard",
                    IDC_STATIC,16,18,144,33
}

---

Those are linker errors which arise because you have not linked the correct libraries. The simplest solution for you would be to start over with a new project and make sure you select 'Windows Application' from the available 'new project' choices; this will ensure that a default subset of windows libraries will be linked when you build your project.

thx
It compiles without any errors but the picture doesnt appear on the window

Problem solved: HBITMAP g_hbmBall = NULL; had to be a global variable