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Microsoft Programmer's Library 1.3
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win_lrn
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sound
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setsndns.c
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C/C++ Source or Header
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1988-08-10
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3KB
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95 lines
/*
* SetSoundNoise
* setsndns
*
* SetSoundNoise(nSource, nDuration) sets the source and duration of a
* noise in the noise hardware of the play device. nSource is a short
* integer specifying the noise source. nDuration is a short integer value
* specifying the duration of the noise in clock tics.
*
* This program demonstrates the use of the function SetSoundNoise.
* As shown below, OpenSound must be invoked before SetSoundNoise can
* be called. SetSoundNoise(nSource, nDuration) returns zero if the
* function is successful. If the source is invalid, it returns S_SERDSR.
*
*/
#include "windows.h"
/* Procedure called when the application is loaded for the first time */
BOOL WinInit( hInstance )
HANDLE hInstance;
{
PWNDCLASS pClass;
pClass = (PWNDCLASS)LocalAlloc( LPTR, sizeof(WNDCLASS) );
/* registering the parent window class */
pClass->hCursor = LoadCursor( NULL, IDC_ARROW );
pClass->lpszMenuName = (LPSTR)NULL;
pClass->lpszClassName = (LPSTR)"Window";
pClass->hbrBackground = (HBRUSH)GetStockObject( WHITE_BRUSH );
pClass->hInstance = hInstance;
pClass->style = CS_HREDRAW | CS_VREDRAW;
pClass->lpfnWndProc = DefWindowProc;
if (!RegisterClass( (LPWNDCLASS)pClass ) )
/* Initialization failed.
* Windows will automatically deallocate all allocated memory.
*/
return FALSE;
LocalFree( (HANDLE) pClass );
return TRUE; /* Initialization succeeded */
}
int PASCAL WinMain( hInstance, hPrevInstance, lpszCmdLine, cmdShow )
HANDLE hInstance, hPrevInstance;
LPSTR lpszCmdLine;
int cmdShow;
{
HWND hWnd; /* Handle to the parent window */
short nResult; /* Contains return value for SetSoundNoise function */
WinInit (hInstance);
hWnd = CreateWindow((LPSTR)"Window",
(LPSTR)"SetSoundNoise",
WS_TILEDWINDOW,
20,20,400,200,
(HWND)NULL, /* no parent */
(HMENU)NULL, /* use class menu */
(HANDLE)hInstance, /* handle to window instance */
(LPSTR)NULL /* no params to pass on */
);
/* Make window visible according to the way the application is activated */
ShowWindow( hWnd, cmdShow );
UpdateWindow( hWnd );
OpenSound (); /* Must open access to the play device before
* SetSoundNoise can be invoked */
/*********************************************************************/
/* S_PERIOD512 is the noise source (high pitch hiss). 3000 is the
* duration of the noise in clock tics. */
nResult = SetSoundNoise(S_PERIOD512,3000); /* nResult = 0 if successful */
/*********************************************************************/
CloseSound(); /* Close access to play device */
/* return code for SetSoundNoise routine */
if (nResult==0)
MessageBox (hWnd, (LPSTR)"SetSoundNoise worked",
(LPSTR)"Done", MB_OK);
else if (nResult == S_SERDSR)
MessageBox (hWnd, (LPSTR)"The noise source parameter is invalid",
(LPSTR)NULL, MB_OK);
return 0;
}