콤보박스 (combo box)

#include <windows.h>

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

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);
    
    while(GetMessage(&Message,0,0,0)) {
        TranslateMessage(&Message);
        DispatchMessage(&Message);
    }
    return Message.wParam;
}

#define ID_COMBOBOX 100
char Items[][15]={"Apple","Orange","Melon","Grape","Strawberry"};
char str[128];
HWND hCombo;
LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
    int i;
    switch(iMessage) {
    case WM_CREATE:
        hCombo=CreateWindow("combobox",NULL,WS_CHILD | WS_VISIBLE | CBS_DROPDOWN,
            10,10,100,200,hWnd,(HMENU)ID_COMBOBOX,g_hInst,NULL);
        for (i=0;i<5;i++)
            SendMessage(hCombo,CB_ADDSTRING,0,(LPARAM)Items[i]);
        return 0;
    case WM_COMMAND:
        switch (LOWORD(wParam)) {
        case ID_COMBOBOX:
            switch (HIWORD(wParam)) {
            case CBN_SELCHANGE:
                i=SendMessage(hCombo, CB_GETCURSEL,0,0);
                SendMessage(hCombo, CB_GETLBTEXT, i, (LPARAM)str);
                SetWindowText(hWnd, str);
                break;
            case CBN_EDITCHANGE:
                GetWindowText(hCombo, str, 128);
                SetWindowText(hWnd,str);
                break;
            }
        }
        return 0;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}