/*-------------------------------------------------
   NOPOPUPS.C -- Demonstrates No-Popup Nested Menu
                 (c) Charles Petzold, 1998
  -------------------------------------------------*/

#include <windows.h>
#include "resource.h"

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
{
     static TCHAR szAppName[] = TEXT ("NoPopUps") ;
     HWND         hwnd ;
     MSG          msg ;
     WNDCLASS     wndclass ;
     
     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
     wndclass.lpfnWndProc   = WndProc ;
     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
     wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
     wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
     wndclass.lpszMenuName  = NULL ;
     wndclass.lpszClassName = szAppName ;
     
     if (!RegisterClass (&wndclass))
     {
          MessageBox (NULL, TEXT ("This program requires Windows NT!"),
                      szAppName, MB_ICONERROR) ;
          return 0 ;
     }
     
     hwnd = CreateWindow (szAppName, 
                          TEXT ("No-Popup Nested Menu Demonstration"),
                          WS_OVERLAPPEDWINDOW,
                          CW_USEDEFAULT, CW_USEDEFAULT,
                          CW_USEDEFAULT, CW_USEDEFAULT,
                          NULL, NULL, hInstance, NULL) ;
     
     ShowWindow (hwnd, iCmdShow) ;
     UpdateWindow (hwnd) ;
     
     while (GetMessage (&msg, NULL, 0, 0))
     {
          TranslateMessage (&msg) ;
          DispatchMessage (&msg) ;
     }
     return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
     static HMENU hMenuMain, hMenuEdit, hMenuFile ;
     HINSTANCE    hInstance ;
     
     switch (message)
     {
     case WM_CREATE:
          hInstance = (HINSTANCE) GetWindowLong (hwnd, GWL_HINSTANCE) ;
          
          hMenuMain = LoadMenu (hInstance, TEXT ("MenuMain")) ;
          hMenuFile = LoadMenu (hInstance, TEXT ("MenuFile")) ;
          hMenuEdit = LoadMenu (hInstance, TEXT ("MenuEdit")) ;
          
          SetMenu (hwnd, hMenuMain) ;
          return 0 ;
          
     case WM_COMMAND:
          switch (LOWORD (wParam))
          {
          case IDM_MAIN:
               SetMenu (hwnd, hMenuMain) ;
               return 0 ;
               
          case IDM_FILE:
               SetMenu (hwnd, hMenuFile) ;
               return 0 ;
               
          case IDM_EDIT:
               SetMenu (hwnd, hMenuEdit) ;
               return 0 ;
               
          case IDM_FILE_NEW:
          case IDM_FILE_OPEN:
          case IDM_FILE_SAVE:
          case IDM_FILE_SAVE_AS:
          case IDM_EDIT_UNDO:
          case IDM_EDIT_CUT:
          case IDM_EDIT_COPY:
          case IDM_EDIT_PASTE:
          case IDM_EDIT_CLEAR:
               MessageBeep (0) ;
               return 0 ;
          }
          break ;
          
     case WM_DESTROY:
          SetMenu (hwnd, hMenuMain) ;
          DestroyMenu (hMenuFile) ;
          DestroyMenu (hMenuEdit) ;
               
          PostQuitMessage (0) ;
          return 0 ;
     }
     return DefWindowProc (hwnd, message, wParam, lParam) ;
}