dll 이용

#include <windows.h>

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
HINSTANCE g_hInst;
HWND hWndMain;
LPSTR lpszClass="ResDllHost";

int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance
     ,LPSTR lpszCmdParam,int nCmdShow)
{
    HWND hWnd;
    MSG Message;
    WNDCLASS WndClass;
    g_hInst=hInstance;
    
    WndClass.cbClsExtra=0;
    WndClass.cbWndExtra=0;
    WndClass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
    WndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
    WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
    WndClass.hInstance=hInstance;
    WndClass.lpfnWndProc=(WNDPROC)WndProc;
    WndClass.lpszClassName=lpszClass;
    WndClass.lpszMenuName=NULL;
    WndClass.style=CS_HREDRAW | CS_VREDRAW;
    RegisterClass(&WndClass);

    hWnd=CreateWindow(lpszClass,lpszClass,WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
        NULL,(HMENU)NULL,hInstance,NULL);
    ShowWindow(hWnd,nCmdShow);
    hWndMain=hWnd;
    
    while(GetMessage(&Message,0,0,0)) {
        TranslateMessage(&Message);
        DispatchMessage(&Message);
    }
    return Message.wParam;
}

#define IDS_STRING1                     1
#define IDS_STRING2                     2
#define ID_FILE_MENU1                 40001
#define ID_FILE_MENU2                 40002
#define ID_FILE_EXIT                    40003

HMODULE hRes;
LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
    HDC hdc;
    PAINTSTRUCT ps;
    char Dir[MAX_PATH];
    HMENU hMenu;
    char str[128];

    switch(iMessage) {
    case WM_CREATE:
        GetCurrentDirectory(MAX_PATH,Dir);
        strcat(Dir,"\\ResDll.dll");
        hRes=LoadLibrary(Dir);
        if (hRes==NULL) {
            MessageBox(hWnd,"리소스 DLL 초기화 실패","에러",MB_OK);
            DestroyWindow(hWnd);
        }
        hMenu=LoadMenu(hRes,"IDR_MENU1");
        SetMenu(hWnd,hMenu);
        return 0;
    case WM_COMMAND:
        switch(LOWORD(wParam)) {
        case ID_FILE_MENU1:
            LoadString(hRes,IDS_STRING1,str,128);
            MessageBox(hWnd,str,"알림",MB_OK);
            break;
        case ID_FILE_MENU2:
            LoadString(hRes,IDS_STRING2,str,128);
            MessageBox(hWnd,str,"알림",MB_OK);
            break;
        case ID_FILE_EXIT:
            DestroyWindow(hWnd);
            break;
        }
        return 0;
    case WM_PAINT:
        hdc=BeginPaint(hWnd, &ps);
        EndPaint(hWnd, &ps);
        return 0;
    case WM_DESTROY:
        if (hRes)
            FreeLibrary(hRes);
        PostQuitMessage(0);
        return 0;
    }
    return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}