Windows程序设计 MenuDemo（源代码）.rar

/*----------------------------------------- MENUDEMO.C -- Menu Demonstration (c) Charles Petzold, 1998 -----------------------------------------*/ #include <windows.h> #include "resource.h" #define ID_TIMER 1 LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ; TCHAR szAppName[] = TEXT ("MenuDemo") ; int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) { 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 = szAppName ; wndclass.lpszClassName = szAppName ; if (!RegisterClass (&wndclass)) { MessageBox (NULL, TEXT ("This program requires Windows NT!"), szAppName, MB_ICONERROR) ; return 0 ; } hwnd = CreateWindow (szAppName, TEXT ("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 int idColor [5] = { WHITE_BRUSH, LTGRAY_BRUSH, GRAY_BRUSH, DKGRAY_BRUSH, BLACK_BRUSH } ; static int iSelection = IDM_BKGND_WHITE ; HMENU hMenu ; switch (message) { case WM_COMMAND: hMenu = GetMenu (hwnd) ; switch (LOWORD (wParam)) { case IDM_FILE_NEW: case IDM_FILE_OPEN: case IDM_FILE_SAVE: case IDM_FILE_SAVE_AS: MessageBeep (0) ; return 0 ; case IDM_APP_EXIT: SendMessage (hwnd, WM_CLOSE, 0, 0) ; return 0 ; case IDM_EDIT_UNDO: case IDM_EDIT_CUT: case IDM_EDIT_COPY: case IDM_EDIT_PASTE: case IDM_EDIT_CLEAR: MessageBeep (0) ; return 0 ; case IDM_BKGND_WHITE: // Note: Logic below case IDM_BKGND_LTGRAY: // assumes that IDM_WHITE case IDM_BKGND_GRAY: // through IDM_BLACK are case IDM_BKGND_DKGRAY: // consecutive numbers in case IDM_BKGND_BLACK: // the order shown here. CheckMenuItem (hMenu, iSelection, MF_UNCHECKED) ; iSelection = LOWORD (wParam) ; CheckMenuItem (hMenu, iSelection, MF_CHECKED) ; SetClassLong (hwnd, GCL_HBRBACKGROUND, (LONG) GetStockObject (idColor [LOWORD (wParam) - IDM_BKGND_WHITE])) ; InvalidateRect (hwnd, NULL, TRUE) ; return 0 ; case IDM_TIMER_START: if (SetTimer (hwnd, ID_TIMER, 1000, NULL)) { EnableMenuItem (hMenu, IDM_TIMER_START, MF_GRAYED) ; EnableMenuItem (hMenu, IDM_TIMER_STOP, MF_ENABLED) ; } return 0 ; case IDM_TIMER_STOP: KillTimer (hwnd, ID_TIMER) ; EnableMenuItem (hMenu, IDM_TIMER_START, MF_ENABLED) ; EnableMenuItem (hMenu, IDM_TIMER_STOP, MF_GRAYED) ; return 0 ; case IDM_APP_HELP: MessageBox (hwnd, TEXT ("Help not yet implemented!"), szAppName, MB_ICONEXCLAMATION | MB_OK) ; return 0 ; case IDM_APP_ABOUT: MessageBox (hwnd, TEXT ("Menu Demonstration Program\n") TEXT ("(c) Charles Petzold, 1998"), szAppName, MB_ICONINFORMATION | MB_OK) ; return 0 ; } break ; case WM_TIMER: MessageBeep (0) ; return 0 ; case WM_DESTROY: PostQuitMessage (0) ; return 0 ; } return DefWindowProc (hwnd, message, wParam, lParam) ; }