Win32Api_달력

#include <windows.h> 
#include <commctrl.h> 
#include <wchar.h> 

#pragma comment(lib, "comctl32.lib") 
#define DATE_SIZE 20 

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); 
void CreateControls(HWND); 
void GetSelectedDate(HWND, HWND); 

HWND hlbl; 
HWND hMonthCal; 

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, 
  LPSTR lpCmdLine, int nCmdShow) 
{ 
  HWND hwnd; 
  MSG  msg; 
     
  WNDCLASSW wc = {0}; 
  wc.lpszClassName = L"Month Calendar"; 
  wc.hInstance     = hInstance ; 
  wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE); 
  wc.lpfnWndProc   = WndProc ; 
  wc.hCursor       = LoadCursor(0,IDC_ARROW); 
   
  RegisterClassW(&wc); 

  hwnd = CreateWindowW(wc.lpszClassName, L"Month Calendar", 
    WS_OVERLAPPEDWINDOW | WS_VISIBLE, 
    100, 100, 250, 300, 0, 0, hInstance, 0);  

  while( GetMessage(&msg, NULL, 0, 0)) {
    DispatchMessage(&msg); 
  } 

  return (int) msg.wParam; 
} 

LRESULT CALLBACK WndProc( HWND hwnd, UINT msg,  
  WPARAM wParam, LPARAM lParam ) 
{ 
  LPNMHDR lpNmHdr; 

  switch(msg)   
  { 
    case WM_CREATE: 

      CreateControls(hwnd); 
      break; 

    case WM_NOTIFY: 

      lpNmHdr = (LPNMHDR) lParam; 

      if (lpNmHdr->code==MCN_SELECT) { 
        GetSelectedDate(hMonthCal, hlbl); 
      } 
      break; 

    case WM_DESTROY: 

      PostQuitMessage(0); 
      break;  
  } 

  return DefWindowProcW(hwnd, msg, wParam, lParam); 
} 

void CreateControls(HWND hwnd) 
{ 
  hlbl = CreateWindowW(L"STATIC", L"",  
    WS_CHILD | WS_VISIBLE, 80, 240, 80, 30,
    hwnd, (HMENU)1, NULL, NULL);

  INITCOMMONCONTROLSEX icex; 

  icex.dwSize = sizeof(icex); 
  icex.dwICC  = ICC_DATE_CLASSES; 
  InitCommonControlsEx(&icex); 

  hMonthCal = CreateWindowW(L"SysMonthCal32", L"",           
    WS_BORDER | WS_CHILD | WS_VISIBLE | MCS_NOTODAYCIRCLE,   
    20, 20, 200, 200, hwnd, (HMENU)2, NULL, NULL);
} 

void GetSelectedDate(HWND hMonthCal, HWND hlbl) 
{ 
  SYSTEMTIME time; 
  wchar_t date[DATE_SIZE]; 

  ZeroMemory(&time, sizeof(SYSTEMTIME)); 
  SendMessage(hMonthCal, MCM_GETCURSEL, 0, (LPARAM) &time);
   
  swprintf(date, DATE_SIZE, L"%d-%d-%d", time.wYear, time.wMonth, time.wDay); 
  SetWindowTextW(hlbl, date); 
}