파일 열기 (GetOpenFileName)

#include <windows.h>

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

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,500,300,
        NULL,(HMENU)NULL,hInstance,NULL);
    ShowWindow(hWnd,nCmdShow);
    
    while(GetMessage(&Message,0,0,0)) {
        TranslateMessage(&Message);
        DispatchMessage(&Message);
    }
    return Message.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
    HDC hdc;
    PAINTSTRUCT ps;
    char Mes[]="마우스 왼쪽 버튼을 누르십시요";
    OPENFILENAME OFN;        // 파일열기 구조체 선언
    char str[300];
    char lpstrFile[MAX_PATH]="";

    switch(iMessage) {
    case WM_LBUTTONDOWN:
        memset(&OFN, 0, sizeof(OPENFILENAME));        // 메모리 0으로 초기화
        OFN.lStructSize = sizeof(OPENFILENAME);
        OFN.hwndOwner=hWnd;
        OFN.lpstrFilter="모든 파일(*.*)\0*.*\0";    // 파일 확장자 제한
        OFN.lpstrFile=lpstrFile;
        OFN.nMaxFile=MAX_PATH;                        // 파일명 제한
        if (GetOpenFileName(&OFN)!=0) {
            wsprintf(str,"%s 파일을 선택했습니다.",OFN.lpstrFile);    // 열린 파일명
            MessageBox(hWnd,str,"파일 열기 성공",MB_OK);
        }
        return 0;
    case WM_PAINT:
        hdc=BeginPaint(hWnd, &ps);
        TextOut(hdc,10,10,Mes,strlen(Mes));
        EndPaint(hWnd, &ps);
        return 0;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}