POPPAD2.C        /*---------------------------------------------------------------------------          POPPAD2.C --          Popup Editor Version 2 (includes menu)                                                                 (c) Charles Petzold, 1998        ---------------------------------------------------------------------------*/        #include <windows.h>        #include "resource.h"        #define ID_EDIT                    1        LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);        TCHAR szAppName[] = TEXT ("PopPad2") ;        int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,                                                                PSTR szCmdLine, int iCmdShow)        {                   HACCEL                hAccel ;                   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 (hInstance, szAppName) ;                   wndclass.hCursor                                     = LoadCursor (NULL, IDC_ARROW) ;                   wndclass.hbrBackground                       = (HBRUSH) GetStockObject (WHITE_BRUSH) ;                   wndclass.lpszMenuName                        = szAppName ;                   wndclass.lpszClassName                       = szAppName ;                             if (!RegisterClass (&wndclass))                   {                          MessageBox (  NULL, TEXT ("This program requires Windows NT!"),                           szAppName, MB_ICONERROR) ;                          return 0 ;                   }                              hwnd = CreateWindow (szAppName, szAppName,                             WS_OVERLAPPEDWINDOW,                            GetSystemMetrics (SM_CXSCREEN) / 4,                           GetSystemMetrics (SM_CYSCREEN) / 4,                            GetSystemMetrics (SM_CXSCREEN) / 2,                            GetSystemMetrics (SM_CYSCREEN) / 2,                            NULL, NULL, hInstance, NULL) ;                              ShowWindow (hwnd, iCmdShow) ;                   UpdateWindow (hwnd) ;                              hAccel = LoadAccelerators (hInstance, szAppName) ;                   while (GetMessage (&msg, NULL, 0, 0))                   {                         if (!TranslateAccelerator (hwnd, hAccel, &msg))                                  {                                                 TranslateMessage (&msg) ;                                                 DispatchMessage (&msg) ;                          }                   }                   return msg.wParam ;        }        AskConfirmation (HWND hwnd)        {                   return MessageBox (   hwnd, TEXT ("Really want to close PopPad2 "),                                  szAppName, MB_YESNO | MB_ICONQUESTION) ;        }        LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,LPARAM lParam)        {                   static HWND   hwndEdit ;                   int                                  iSelect, iEnable ;                              switch (message)                   {                   case   WM_CREATE:                          hwndEdit = CreateWindow (TEXT ("edit"), NULL,                          WS_CHILD | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL |                          WS_BORDER | ES_LEFT | ES_MULTILINE |                          ES_AUTOHSCROLL | ES_AUTOVSCROLL,                          0, 0, 0, 0, hwnd, (HMENU) ID_EDIT,                          ((LPCREATESTRUCT) lParam)->hInstance, NULL) ;                          return 0 ;                                   case   WM_SETFOCUS:                         SetFocus (hwndEdit) ;                          return 0 ;                                   case   WM_SIZE:                          MoveWindow (hwndEdit, 0, 0, LOWORD (lParam), HIWORD (lParam), TRUE) ;                          return 0 ;                                   case   WM_INITMENUPOPUP:                          if (lParam == 1)                          {                                                 EnableMenuItem ((HMENU) wParam, IDM_EDIT_UNDO,                                  SendMessage (hwndEdit, EM_CANUNDO, 0, 0)                                     MF_ENABLED : MF_GRAYED) ;                                                                      EnableMenuItem ((HMENU) wParam, IDM_EDIT_PASTE,                                  IsClipboardFormatAvailable (CF_TEXT)                                     MF_ENABLED : MF_GRAYED) ;                                                                      iSelect = SendMessage (hwndEdit, EM_GETSEL, 0, 0) ;                                                                     if (HIWORD (iSelect) == LOWORD (iSelect))                                                                 iEnable = MF_GRAYED ;                                                 else                                                                 iEnable = MF_ENABLED ;                                           EnableMenuItem ((HMENU) wParam, IDM_EDIT_CUT,  iEnable) ;                      EnableMenuItem ((HMENU) wParam, IDM_EDIT_COPY,  iEnable) ;                      EnableMenuItem ((HMENU) wParam, IDM_EDIT_CLEAR, iEnable) ;                                                 return 0 ;                          }                          break ;                   case   WM_COMMAND:                          if (lParam)                          {                                          if (LOWORD (lParam) == ID_EDIT &&                               (HIWORD (wParam) == EN_ERRSPACE ||                               HIWORD (wParam) == EN_MAXTEXT))                           MessageBox (hwnd, TEXT ("Edit control out of space."),                               szAppName, MB_OK | MB_ICONSTOP) ;                                          return 0 ;                 }                          else   switch (LOWORD (wParam))                          {                          case   IDM_FILE_NEW:                          case   IDM_FILE_OPEN:                         case   IDM_FILE_SAVE:                          case   IDM_FILE_SAVE_AS:                          case   IDM_FILE_PRINT:                                                 MessageBeep (0) ;                                                 return 0 ;                                          case   IDM_APP_EXIT:                                                 SendMessage (hwnd, WM_CLOSE, 0, 0) ;                                                 return 0 ;                          case   IDM_EDIT_UNDO:                                                 SendMessage (hwndEdit, WM_UNDO, 0, 0) ;                                                 return 0 ;                                          case   IDM_EDIT_CUT:                                                 SendMessage (hwndEdit, WM_CUT, 0, 0) ;                                                 return 0 ;                                          case   IDM_EDIT_COPY:                                                 SendMessage (hwndEdit, WM_COPY, 0, 0) ;                                                 return 0 ;                                          case   IDM_EDIT_PASTE:                                                 SendMessage (hwndEdit, WM_PASTE, 0, 0) ;                                                 return 0 ;                                          case   IDM_EDIT_CLEAR:                                                 SendMessage (hwndEdit, WM_CLEAR, 0, 0) ;                                                return 0 ;                    case   IDM_EDIT_SELECT_ALL:                                                 SendMessage (hwndEdit, EM_SETSEL, 0, -1) ;                                                 return 0 ;                                          case   IDM_HELP_HELP:                                                 MessageBox (hwnd, TEXT ("Help not yet implemented!"),                                  szAppName, MB_OK | MB_ICONEXCLAMATION) ;                                                 return 0 ;                                          case   IDM_APP_ABOUT:                                                 MessageBox (hwnd, TEXT ("POPPAD2 (c) Charles Petzold, 1998"),                                  szAppName, MB_OK | MB_ICONINFORMATION) ;                                                 return 0 ;                          }                          break ;                           case   WM_CLOSE:                          if (IDYES == AskConfirmation (hwnd))                                                 DestroyWindow (hwnd) ;                          return 0 ;                                   case   WM_QUERYENDSESSION:                          if (IDYES == AskConfirmation (hwnd))                                                 return 1 ;                          else                                                 return 0 ;                                   case   WM_DESTROY:                          PostQuitMessage (0) ;                          return 0 ;            }                   return DefWindowProc (hwnd, message, wParam, lParam) ;        }