BEEPER1 程序测试问题

付笑

BEEPER1 程序书上说移动窗口的时候 会停止发出嘟嘟声音，我测试的时候怎么不是这样啊

代码如下:

1. /*-----------------------------------------
   
2. BEEPER1.C -- Timer Demo Program No. 1
   
3. (c) Charles Petzold, 1998
   
4. -----------------------------------------*/
   
5. 
   
6. #include <windows.h>
   
7. 
   
8. #define ID_TIMER 1
   
9. 
   
10. LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
    
11. 
    
12. int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
    
13. PSTR szCmdLine, int iCmdShow)
    
14. {
    
15. static TCHAR szAppName[] = TEXT ("Beeper1") ;
    
16. HWND hwnd ;
    
17. MSG msg ;
    
18. WNDCLASS wndclass ;
    
19. 
    
20. wndclass.style = CS_HREDRAW | CS_VREDRAW ;
    
21. wndclass.lpfnWndProc = WndProc ;
    
22. wndclass.cbClsExtra = 0 ;
    
23. wndclass.cbWndExtra = 0 ;
    
24. wndclass.hInstance = hInstance ;
    
25. wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
    
26. wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
    
27. wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
    
28. wndclass.lpszMenuName = NULL ;
    
29. wndclass.lpszClassName = szAppName ;
    
30. 
    
31. if (!RegisterClass (&wndclass))
    
32. {
    
33. MessageBox (NULL, TEXT ("Program requires Windows NT!"),
    
34. szAppName, MB_ICONERROR) ;
    
35. return 0 ;
    
36. }
    
37. 
    
38. hwnd = CreateWindow (szAppName, TEXT ("Beeper1 Timer Demo"),
    
39. WS_OVERLAPPEDWINDOW,
    
40. CW_USEDEFAULT, CW_USEDEFAULT,
    
41. CW_USEDEFAULT, CW_USEDEFAULT,
    
42. NULL, NULL, hInstance, NULL) ;
    
43. 
    
44. ShowWindow (hwnd, iCmdShow) ;
    
45. UpdateWindow (hwnd) ;
    
46. 
    
47. while (GetMessage (&msg, NULL, 0, 0))
    
48. {
    
49. TranslateMessage (&msg) ;
    
50. DispatchMessage (&msg) ;
    
51. }
    
52. return msg.wParam ;
    
53. }
    
54. 
    
55. LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
    
56. {
    
57. static BOOL fFlipFlop = FALSE ;
    
58. HBRUSH hBrush ;
    
59. HDC hdc ;
    
60. PAINTSTRUCT ps ;
    
61. RECT rc ;
    
62. 
    
63. switch (message)
    
64. {
    
65. case WM_CREATE:
    
66. SetTimer (hwnd, ID_TIMER, 1000, NULL) ;
    
67. return 0 ;
    
68. 
    
69. case WM_TIMER :
    
70. MessageBeep (MB_ICONASTERISK) ;
    
71. fFlipFlop = !fFlipFlop ;
    
72. InvalidateRect (hwnd, NULL, FALSE) ;
    
73. return 0 ;
    
74. 
    
75. case WM_PAINT :
    
76. hdc = BeginPaint (hwnd, &ps) ;
    
77. 
    
78. GetClientRect (hwnd, &rc) ;
    
79. hBrush = CreateSolidBrush (fFlipFlop ? RGB(255,0,0) : RGB(0,0,255)) ;
    
80. FillRect (hdc, &rc, hBrush) ;
    
81. 
    
82. EndPaint (hwnd, &ps) ;
    
83. DeleteObject (hBrush) ;
    
84. return 0 ;
    
85. 
    
86. case WM_DESTROY :
    
87. KillTimer (hwnd, ID_TIMER) ;
    
88. PostQuitMessage (0) ;
    
89. return 0 ;
    
90. }
    
91. return DefWindowProc (hwnd, message, wParam, lParam) ;
    
92. }
    

复制代码

风のQ

...你确定这个代码是完整的？
这个代码的消息响应函数中，只处理了WM_CREATE， WM_PAINT, WM_DESTROY, WM_TIIME,四种消息
这四种消息都和窗口移动没关系. 你应该响应些和窗口移动相关的消息，比如WM_MOVING