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

HINSTANCE InstanceHandle;
HWND      MainWindow;

enum MenuCommand
{
   FileOpenCmd = 1000,
   FileSaveCmd,
   FileCloseCmd,
   AboutCmd
};

LRESULT CALLBACK MainWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
   switch (msg)
   {
      case WM_DESTROY:
         PostQuitMessage(0);
         break;
      case WM_COMMAND:
         switch(LOWORD(wParam))
         {
         case FileOpenCmd:
             MessageBox(hwnd, "Open", "Test", MB_OK);
             break;
         case FileSaveCmd:
             MessageBox(hwnd, "Save", "Test", MB_OK);
             break;
         case FileCloseCmd:
             MessageBox(hwnd, "Close", "Test", MB_OK);
             break;
         case AboutCmd:
             MessageBox(hwnd, "About", "Test", MB_OK);
             break;
         }
         break;
      default:
         return DefWindowProc(hwnd,msg,wParam,lParam);
   }
   return 0;
}

HWND CreateMainWindow()
{
   WNDCLASS wc;
   memset(&wc, 0, sizeof(WNDCLASS));
   wc.style = CS_HREDRAW | CS_VREDRAW  | CS_DBLCLKS ;
   wc.lpfnWndProc = (WNDPROC )MainWndProc;
   wc.hInstance = InstanceHandle;
   wc.hbrBackground = (HBRUSH )(COLOR_WINDOW + 1);
   wc.lpszClassName = "SimpleWinWndClass";
   wc.lpszMenuName = 0;
   wc.hCursor = LoadCursor(NULL, IDC_ARROW);
   wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
   if(!RegisterClass(&wc))
      return 0;

   HMENU FileMenu = CreateMenu();
   AppendMenu(FileMenu, MF_STRING, FileOpenCmd, "Open");
   AppendMenu(FileMenu, MF_STRING, FileSaveCmd, "Save");
   AppendMenu(FileMenu, MF_SEPARATOR, 0 , 0);
   AppendMenu(FileMenu, MF_STRING, FileCloseCmd, "Close");

   HMENU HelpMenu = CreateMenu();
   AppendMenu(HelpMenu, MF_STRING, AboutCmd, "About");

   HMENU MainMenu = CreateMenu();
   AppendMenu(MainMenu, MF_POPUP, (UINT )FileMenu, "File");
   AppendMenu(MainMenu, MF_POPUP, (UINT )HelpMenu, "Help");

   return CreateWindow("SimpleWinWndClass",
                       "Simple-Window",
                       WS_MINIMIZEBOX | WS_VISIBLE |
                       WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_MAXIMIZEBOX |
                       WS_CAPTION | WS_BORDER | WS_SYSMENU | WS_THICKFRAME,
                       CW_USEDEFAULT, 0, CW_USEDEFAULT, 0,
                       0,
                       MainMenu,
                       InstanceHandle,
                       0);
}

int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine,
                   INT nCmdShow)
{
   InstanceHandle = hInstance;
   InitCommonControls();
   if((MainWindow = CreateMainWindow()) == (HWND )0)
   {
      MessageBox(0, "Failed to create MainWindow!", "Warning", MB_OK);
      return 0;
   }
   ShowWindow(MainWindow, SW_SHOW);
   MSG Msg;
   while(GetMessage(&Msg, 0, 0, 0))
   {
      TranslateMessage(&Msg);
      DispatchMessage(&Msg);
   }
   return Msg.wParam;
}