如何让程序发出嘀嘀嘀的报警声？
如何当按下一个按钮时，让程序发出嘀嘀嘀的报警声，而当按下另一按钮时，使之体停止报警？ 问题点数：50、回复次数：8Top
1 楼rivershan（阿门）回复于 2002-10-23 21:32:22 得分 5
Beep();
Platform SDK: Debugging and Error Handling
Beep
The Beep function generates simple tones on the speaker. The function is synchronous; it does not return control to its caller until the sound finishes.
BOOL Beep(
DWORD dwFreq, // sound frequency
DWORD dwDuration // sound duration
);
Parameters
dwFreq
Windows NT/ 2000: [in] Specifies the frequency, in hertz, of the sound. This parameter must be in the range 37 through 32,767 (0x25 through 0x7FFF).
dwDuration
Windows NT/ 2000: [in] Specifies the duration, in milliseconds, of the sound.
Return Values
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
Remarks
Windows 95: The Beep function ignores the dwFreq and dwDuration parameters. On computers with a sound card, the function plays the default sound event. On computers without a sound card, the function plays the standard system beep.
Requirements
Windows NT/2000: Requires Windows NT 3.1 or later.
Windows 95/98: Requires Windows 95 or later.
Header: Declared in Winbase.h; include Windows.h.
Library: Use Kernel32.lib.
See Also
Error Handling Overview, Error Handling Functions, MessageBeep
Built on Thursday, May 11, 2000Requirements
Windows NT/2000: Requires Windows NT 3.1 or later.
Windows 95/98: Requires Windows 95 or later.
Header: Declared in Winbase.h; include Windows.h.
Library: Use Kernel32.lib.
See Also
Error Handling Overview, Error Handling Functions, MessageBeep
Top
2 楼zhwangquan（聪明的大傻瓜）回复于 2002-10-23 21:48:26 得分 35
UINT m_nTimer;
void CMFCDlgDlg::OnButton1()
{
m_nTimer = SetTimer(1, 200, 0);
}
void CMFCDlgDlg::OnButton2()
{
KillTimer(m_nTimer);
}
void CMFCDlgDlg::OnTimer(UINT nIDEvent)
{
Beep(0x300,0x30);
CDialog::OnTimer(nIDEvent);
}Top
3 楼dycdyc123（重出江湖）回复于 2002-10-23 21:53:48 得分 3
Beep 可以的！
PlaySound也可以！
Top
4 楼lysde（无所谓）回复于 2002-10-24 09:59:02 得分 2
应该用Beep();Top
5 楼lqbn（长天）回复于 2002-10-24 10:22:24 得分 2
同意楼上的。很容易实现的。Top
6 楼qing_li73（Vincent Lee）回复于 2002-10-24 10:28:42 得分 0
Surely, use the "Beep()" function is an easy and effective way to accomplish ur goal .....
Top
7 楼qing_li73（Vincent Lee）回复于 2002-10-24 10:31:33 得分 3
Another way is to use "MessageBeep", see the samples below :
http://www.codeproject.com/combobox/automultcolcombobox.aspTop
8 楼qing_li73（Vincent Lee）回复于 2002-10-24 10:32:51 得分 0
Another way is to use "MessageBeep", see the sample below :
http://www.codeproject.com/combobox/automultcolcombobox.aspTop
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