시간 설정 (INITCOMMONCONTROLSEX, SYSTEMTIME, ICC_DATE_CLASSES, DATETIMEPICK_CLASS, DateTime_GetSystemtime, DateTime_SetSystemtime)

//
// IE 3.0 이상에서 실행 가능
//
#include <windows.h>

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

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;
}

#include <commctrl.h>
HWND hDtp;
LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
    INITCOMMONCONTROLSEX icex;
    SYSTEMTIME tm;
    char str[255];

    switch(iMessage) {
    case WM_CREATE:
        icex.dwSize=sizeof(icex);
        icex.dwICC=ICC_DATE_CLASSES;
        InitCommonControlsEx(&icex);    // 반드시 InitCommonControlsEx로 초기화 해야된다.
        hDtp=CreateWindow(DATETIMEPICK_CLASS, "DTP",WS_BORDER | WS_CHILD | WS_VISIBLE |
            DTS_SHORTDATEFORMAT,
            50,50,200,25,hWnd,NULL,g_hInst,NULL);
        return 0;
    case WM_LBUTTONDOWN:
        DateTime_GetSystemtime(hDtp,&tm);
        wsprintf(str,"%d년 %d월 %d일을 선택하셨습니다",tm.wYear, tm.wMonth, tm.wDay);
        MessageBox(hWnd, str, "알림",MB_OK);
        return 0;
    case WM_RBUTTONDOWN:
        memset(&tm,0,sizeof(SYSTEMTIME));        // time 초기화
        tm.wYear=1970;
        tm.wMonth=6;
        tm.wDay=29;
        DateTime_SetSystemtime(hDtp,GDT_VALID,&tm);
        return 0;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}