리스트 박스 다중선택 (listbox)

#include <windows.h>

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

int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance
         ,LPSTR lpszCmdParam,int nCmdShow)
{
    HWND hWnd;
    MSG Message;
    WNDCLASS WndClass;
    g_hInst=hInstance;
    
    if(!hPrevInstance) {
        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);
    
    while(GetMessage(&Message,0,0,0)) {
        TranslateMessage(&Message);
        DispatchMessage(&Message);
    }
    return Message.wParam;
}

#define ID_LISTBOX 100
#define ID_BTNADD 101
#define ID_BTNDELETE 102
HWND hList, hBtnAdd, hBtnDelete;
char *data[]={"하나","둘","삼","넷","오","여섯","칠","팔","아홉","공"};        // DB
LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
    int i,num;
    int buffer[100];
    switch(iMessage) {
    case WM_CREATE:
        // 리스트 박스와 버튼 두 개를 생성한다.
        // LBS_MULTIPLESEL : 다중 선택
        hList=CreateWindow("listbox",NULL,WS_CHILD | WS_VISIBLE | WS_BORDER |
            WS_VSCROLL | LBS_MULTIPLESEL,// | LBS_EXTENDEDSEL,
            10,10,200,300,hWnd,(HMENU)ID_LISTBOX,g_hInst,NULL);
        hBtnAdd=CreateWindow("button", "Add Strings", WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
            220,50,100,25,hWnd,(HMENU)ID_BTNADD,g_hInst,NULL);
        hBtnDelete=CreateWindow("button", "Delete String", WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
            220,80,100,25,hWnd,(HMENU)ID_BTNDELETE,g_hInst,NULL);
        return 0;
    case WM_COMMAND:
        switch (LOWORD(wParam)) {
        // 아홉개의 문자열을 리스트 박스에 추가한다.
        case ID_BTNADD:
            SendMessage(hList, LB_RESETCONTENT, 0, 0);
            for (i=0;i<10;i++) {
                SendMessage(hList, LB_ADDSTRING, 0, (LPARAM)data[i]); // LB_ADDSTRING
            }
            break;
        // 선택된 모든 항목들을 삭제한다.
        case ID_BTNDELETE:
            num=SendMessage(hList, LB_GETSELCOUNT,0,0);
            if (num!=0) {
                SendMessage(hList, LB_GETSELITEMS,100,(LPARAM)buffer);
                for (i=num-1;i>-1;i--)
                    SendMessage(hList,LB_DELETESTRING,buffer[i],0);
            }
            break;
        }
        return 0;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}