delphi中演奏声音?(100分)

  • 主题发起人 主题发起人 zhmj
  • 开始时间 开始时间
你如果会汇编语言那就好办了,以ASM开头,以END结束,加入汇编程序代码,<br>代码是控制PC喇叭发声的,这里我就不举例了。
 
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<br><br><br><br>#include &lt;windows.h&gt;<br>#include &lt;math.h&gt;<br>#include "resource.h"<br><br>#define SAMPLE_RATE &nbsp; &nbsp; 11025<br>#define FREQ_MIN &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 20<br>#define FREQ_MAX &nbsp; &nbsp; &nbsp; &nbsp; 5000<br>#define FREQ_INIT &nbsp; &nbsp; &nbsp; &nbsp; 440<br>#define OUT_BUFFER_SIZE &nbsp;4096<br>#define PI &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;3.14159<br><br>BOOL CALLBACK DlgProc (HWND, UINT, WPARAM, LPARAM) ;<br><br>TCHAR szAppName [] = TEXT ("SineWave") ;<br><br>int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; PSTR szCmdLine, int iCmdShow)<br>{<br>&nbsp; &nbsp; &nbsp;if (-1 == DialogBox (hInstance, szAppName, NULL, DlgProc))<br>&nbsp; &nbsp; &nbsp;{<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; MessageBox (NULL, TEXT ("This program requires Windows NT!"),<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; szAppName, MB_ICONERROR) ;<br>&nbsp; &nbsp; &nbsp;}<br>&nbsp; &nbsp; &nbsp;return 0 ;<br>}<br><br>VOID FillBuffer (PBYTE pBuffer, int iFreq)<br>{<br>&nbsp; &nbsp; &nbsp;static double fAngle ;<br>&nbsp; &nbsp; &nbsp;int &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; i ;<br><br>&nbsp; &nbsp; &nbsp;for (i = 0 ; i &lt; OUT_BUFFER_SIZE ; i++)<br>&nbsp; &nbsp; &nbsp;{<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pBuffer = (BYTE) (127 + 127 * sin (fAngle)) ;<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; fAngle += 2 * PI * iFreq / SAMPLE_RATE ;<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (fAngle &gt; 2 * PI)<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;fAngle -= 2 * PI ;<br>&nbsp; &nbsp; &nbsp;}<br>}<br><br>BOOL CALLBACK DlgProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)<br>{<br>&nbsp; &nbsp; &nbsp;static BOOL &nbsp; &nbsp; &nbsp; &nbsp; bShutOff, bClosing ;<br>&nbsp; &nbsp; &nbsp;static HWAVEOUT &nbsp; &nbsp; hWaveOut ;<br>&nbsp; &nbsp; &nbsp;static HWND &nbsp; &nbsp; &nbsp; &nbsp; hwndScroll ;<br>&nbsp; &nbsp; &nbsp;static int &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;iFreq = FREQ_INIT ;<br>&nbsp; &nbsp; &nbsp;static PBYTE &nbsp; &nbsp; &nbsp; &nbsp;pBuffer1, pBuffer2 ;<br>&nbsp; &nbsp; &nbsp;static PWAVEHDR &nbsp; &nbsp; pWaveHdr1, pWaveHdr2 ;<br>&nbsp; &nbsp; &nbsp;static WAVEFORMATEX waveformat ;<br>&nbsp; &nbsp; &nbsp;int &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; iDummy ;<br>&nbsp; &nbsp; &nbsp;<br>&nbsp; &nbsp; &nbsp;switch (message)<br>&nbsp; &nbsp; &nbsp;{<br>&nbsp; &nbsp; &nbsp;case WM_INITDIALOG:<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; hwndScroll = GetDlgItem (hwnd, IDC_SCROLL) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; SetScrollRange (hwndScroll, SB_CTL, FREQ_MIN, FREQ_MAX, FALSE) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; SetScrollPos &nbsp; (hwndScroll, SB_CTL, FREQ_INIT, TRUE) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; SetDlgItemInt &nbsp;(hwnd, IDC_TEXT, FREQ_INIT, FALSE) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return TRUE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp;case WM_HSCROLL:<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; switch (LOWORD (wParam))<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; case SB_LINELEFT: &nbsp; iFreq -= &nbsp;1 ; &nbsp;break ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; case SB_LINERIGHT: &nbsp;iFreq += &nbsp;1 ; &nbsp;break ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; case SB_PAGELEFT: &nbsp; iFreq /= &nbsp;2 ; &nbsp;break ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; case SB_PAGERIGHT: &nbsp;iFreq *= &nbsp;2 ; &nbsp;break ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; case SB_THUMBTRACK:<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;iFreq = HIWORD (wParam) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;break ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; case SB_TOP:<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;GetScrollRange (hwndScroll, SB_CTL, &amp;iFreq, &amp;iDummy) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;break ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; case SB_BOTTOM:<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;GetScrollRange (hwndScroll, SB_CTL, &amp;iDummy, &amp;iFreq) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;break ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; iFreq = max (FREQ_MIN, min (FREQ_MAX, iFreq)) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; SetScrollPos (hwndScroll, SB_CTL, iFreq, TRUE) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; SetDlgItemInt (hwnd, IDC_TEXT, iFreq, FALSE) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return TRUE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp;case WM_COMMAND:<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; switch (LOWORD (wParam))<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; case IDC_ONOFF:<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // If turning on waveform, hWaveOut is NULL<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;if (hWaveOut == NULL)<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;{<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;// Allocate memory for 2 headers and 2 buffers<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr1 = malloc (sizeof (WAVEHDR)) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr2 = malloc (sizeof (WAVEHDR)) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pBuffer1 &nbsp;= malloc (OUT_BUFFER_SIZE) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pBuffer2 &nbsp;= malloc (OUT_BUFFER_SIZE) ;<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (!pWaveHdr1 || !pWaveHdr2 || !pBuffer1 || !pBuffer2)<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;if (!pWaveHdr1) free (pWaveHdr1) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;if (!pWaveHdr2) free (pWaveHdr2) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;if (!pBuffer1) &nbsp;free (pBuffer1) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;if (!pBuffer2) &nbsp;free (pBuffer2) ;<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;MessageBeep (MB_ICONEXCLAMATION) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;MessageBox (hwnd, TEXT ("Error allocating memory!"),<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;szAppName, MB_ICONEXCLAMATION | MB_OK) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;return TRUE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;// Variable to indicate Off button pressed<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; bShutOff = FALSE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;// Open waveform audio for output<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveformat.wFormatTag &nbsp; &nbsp; &nbsp;= WAVE_FORMAT_PCM ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveformat.nChannels &nbsp; &nbsp; &nbsp; = 1 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveformat.nSamplesPerSec &nbsp;= SAMPLE_RATE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveformat.nAvgBytesPerSec = SAMPLE_RATE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveformat.nBlockAlign &nbsp; &nbsp; = 1 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveformat.wBitsPerSample &nbsp;= 8 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveformat.cbSize &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 0 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (waveOutOpen (&amp;hWaveOut, WAVE_MAPPER, &amp;waveformat,<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;(DWORD) hwnd, 0, CALLBACK_WINDOW)<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; != MMSYSERR_NOERROR)<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;free (pWaveHdr1) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;free (pWaveHdr2) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;free (pBuffer1) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;free (pBuffer2) ;<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;hWaveOut = NULL ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;MessageBeep (MB_ICONEXCLAMATION) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;MessageBox (hwnd, <br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; TEXT ("Error opening waveform audio device!"),<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; szAppName, MB_ICONEXCLAMATION | MB_OK) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;return TRUE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;// Set up headers and prepare them<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr1-&gt;lpData &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= pBuffer1 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr1-&gt;dwBufferLength &nbsp;= OUT_BUFFER_SIZE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr1-&gt;dwBytesRecorded = 0 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr1-&gt;dwUser &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 0 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr1-&gt;dwFlags &nbsp; &nbsp; &nbsp; &nbsp; = 0 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr1-&gt;dwLoops &nbsp; &nbsp; &nbsp; &nbsp; = 1 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr1-&gt;lpNext &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= NULL ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr1-&gt;reserved &nbsp; &nbsp; &nbsp; &nbsp;= 0 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveOutPrepareHeader (hWaveOut, pWaveHdr1, <br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; sizeof (WAVEHDR)) ;<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr2-&gt;lpData &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= pBuffer2 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr2-&gt;dwBufferLength &nbsp;= OUT_BUFFER_SIZE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr2-&gt;dwBytesRecorded = 0 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr2-&gt;dwUser &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 0 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr2-&gt;dwFlags &nbsp; &nbsp; &nbsp; &nbsp; = 0 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr2-&gt;dwLoops &nbsp; &nbsp; &nbsp; &nbsp; = 1 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr2-&gt;lpNext &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= NULL ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pWaveHdr2-&gt;reserved &nbsp; &nbsp; &nbsp; &nbsp;= 0 ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveOutPrepareHeader (hWaveOut, pWaveHdr2,<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; sizeof (WAVEHDR)) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;}<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // If turning off waveform, reset waveform audio<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;else<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;{<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; bShutOff = TRUE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveOutReset (hWaveOut) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;}<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;return TRUE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; break ;<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;// Message generated from waveOutOpen call<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br>&nbsp; &nbsp; &nbsp;case MM_WOM_OPEN:<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; SetDlgItemText (hwnd, IDC_ONOFF, TEXT ("Turn Off")) ;<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;// Send two buffers to waveform output device<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; FillBuffer (pBuffer1, iFreq) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveOutWrite (hWaveOut, pWaveHdr1, sizeof (WAVEHDR)) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; FillBuffer (pBuffer2, iFreq) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveOutWrite (hWaveOut, pWaveHdr2, sizeof (WAVEHDR)) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return TRUE ;<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;// Message generated when a buffer is finished<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp;case MM_WOM_DONE:<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (bShutOff)<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;waveOutClose (hWaveOut) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;return TRUE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;// Fill and send out a new buffer<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; FillBuffer (((PWAVEHDR) lParam)-&gt;lpData, iFreq) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveOutWrite (hWaveOut, (PWAVEHDR) lParam, sizeof (WAVEHDR)) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return TRUE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp;case MM_WOM_CLOSE:<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveOutUnprepareHeader (hWaveOut, pWaveHdr1, sizeof (WAVEHDR)) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveOutUnprepareHeader (hWaveOut, pWaveHdr2, sizeof (WAVEHDR)) ;<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; free (pWaveHdr1) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; free (pWaveHdr2) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; free (pBuffer1) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; free (pBuffer2) ;<br><br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; hWaveOut = NULL ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; SetDlgItemText (hwnd, IDC_ONOFF, TEXT ("Turn On")) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (bClosing)<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;EndDialog (hwnd, 0) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return TRUE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp;case WM_SYSCOMMAND:<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; switch (wParam)<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; case SC_CLOSE:<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;if (hWaveOut != NULL)<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;{<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; bShutOff = TRUE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; bClosing = TRUE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; waveOutReset (hWaveOut) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;}<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;else<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; EndDialog (hwnd, 0) ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;return TRUE ;<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; break ;<br>&nbsp; &nbsp; &nbsp;}<br>&nbsp; &nbsp; &nbsp;return FALSE ;<br>}
 
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