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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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msdn_vcb
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samples
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soundapp
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soundapp.c
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C/C++ Source or Header
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1997-10-05
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502 lines
/**************************************************************************
*
* SOUNDAPP:
*
* A sample app showing the sndPlaySound API
*
**************************************************************************
*
* THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
* KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
* PURPOSE.
*
* Copyright (C) 1994 - 1997 Microsoft Corporation. All Rights Reserved.
*
**************************************************************************/
#pragma warning(disable: 4001)
#define __SOUNDAPP_C
#define Unused(var) (var=var)
// header dependancies
#include <windows.h>
#include <mmsystem.h>
#include <commdlg.h>
#include <windowsx.h>
#include "resource.h"
//message cracker prototypes
void SoundApp_OnActivate(HWND hwnd, UINT state, HWND hwndActDeact, BOOL fMinimized);
void SoundApp_OnDestroy(HWND hwnd);
void SoundApp_OnCommand(HWND hwnd, int id, HWND hwndCtl, UINT codeNotify);
BOOL About_OnInitDialog(HWND hwnd, HWND hwndFocus, LPARAM lParam);
BOOL About_OnCommand(HWND hwnd, int id, HWND hwndCtl, UINT codeNotify);
//function prototypes
long PASCAL WndProc (HWND, UINT, UINT, LONG);
BOOL CALLBACK AboutDlgProc(HWND hdlg, UINT mMsg, WPARAM wParam, LPARAM lParam);
LRESULT AboutDlgProc2(HWND hdlg, UINT mMsg, WPARAM wParam, LPARAM lParam);
//global variables
HANDLE hInst;
BOOL bRecursing = FALSE;
////////////////////////////////////////////////////////////////////////////////
//WinMain
//
//Purpose: The main procedure
//
//Parameters: HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdParam,
//int nCmdShow
//
//Returns: int
//////////////////////////////////////////////////////////////////////////////////
int PASCAL WinMain (
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpszCmdParam,
int nCmdShow)
{
static char szAppName[] = "SoundApp";
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
Unused(lpszCmdParam);
if (!hPrevInstance)
{
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = DLGWINDOWEXTRA;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon (hInstance, "IDI_SOUNDAPP");
wndclass.hCursor = LoadCursor (NULL, IDI_APPLICATION);
wndclass.hbrBackground = GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName;
RegisterClass (&wndclass);
}
hInst = hInstance;
hwnd = CreateDialog(hInstance, "SoundApp", 0, NULL);
CreateDialog(hInstance, "ID_SOUNDAPP_ABOUT", hwnd, NULL);
ShowWindow (hwnd, nCmdShow);
while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg);
DispatchMessage (&msg);
}
return msg.wParam;
}
/////////////////////////////////////////////////////////////////////////
//WndProc
//
//Purpose: The window procedure
//
//Parameters: HWND hwnd, UINT message, UINT wParam, LONG lParam
//
//Returns: long
///////////////////////////////////////////////////////////////////////////
long PASCAL WndProc (
HWND hwnd,
UINT message,
UINT wParam,
LONG lParam)
{
switch (message)
{
HANDLE_MSG(hwnd, WM_DESTROY, SoundApp_OnDestroy);
HANDLE_MSG(hwnd, WM_ACTIVATE, SoundApp_OnActivate);
HANDLE_MSG(hwnd, WM_COMMAND, SoundApp_OnCommand);
default:
return DefWindowProc (hwnd, message, wParam, lParam);
}
}
//////////////////////////////////////////////////////////////////////
//SoundApp_OnActivate
//
//Purpose: processes a WM_ACTIVATE message
//Initializes controls in the dialog the first time it is activated:
//Checks Synchronous, disables Loop and Stop, and gets default sound
//from win.ini or registry.
//
//Parameters: HWND hwnd, UINT state, HWND hwndActDeact, BOOL fMinimized
//
//Returns: void
//////////////////////////////////////////////////////////////////////
void SoundApp_OnActivate(
HWND hwnd,
UINT state,
HWND hwndActDeact,
BOOL fMinimized)
{
static BOOL fFirstTime = TRUE;
HMENU hMenu;
char SoundBuff[256];
int i=0;
if (fFirstTime)
{
hMenu = GetMenu(hwnd);
SendMessage(GetDlgItem(hwnd, IDC_SYNC), BM_SETCHECK, 1, 0);
CheckMenuItem(hMenu, ID_OPTIONS_SYNC,MF_CHECKED);
EnableWindow(GetDlgItem(hwnd, IDC_LOOP), FALSE);
EnableMenuItem(hMenu, ID_OPTIONS_LOOP, MF_DISABLED | MF_GRAYED);
EnableWindow(GetDlgItem(hwnd, IDC_BUTTON_STOP), FALSE);
GetProfileString("Sounds", "SystemDefault", ",Default", SoundBuff, 256);
//get rid of everything after the filename
while(SoundBuff[i] != ',' && i<255)
{
i++;
}
SoundBuff[i] = 0;
SendMessage(GetDlgItem(hwnd, IDC_EDIT_FILE), WM_SETTEXT, 0, (LPARAM)SoundBuff);
fFirstTime = FALSE;
}
}
//////////////////////////////////////////////////////////////////////
//SoundApp_OnDestroy
//
//Purpose: processes a WM_DESTROY message
//
//Parameters: handle to the main window
//
//Returns: void
//////////////////////////////////////////////////////////////////////
void SoundApp_OnDestroy(HWND hwnd)
{
PostQuitMessage (0);
}
///////////////////////////////////////////////////////////////////////
//SoundApp_OnCommand
//
//Purpose: processes a WM_COMMAND message
//details below for each command.
//
//Parameters: HWND hwnd, int id, HWND hwndCtl, UINT codeNotify
//
//Returns: void
///////////////////////////////////////////////////////////////////////
void SoundApp_OnCommand(
HWND hwnd,
int id,
HWND hwndCtl,
UINT codeNotify)
{
static LPCTSTR lpszSoundName = NULL; //name of the sound to play
static UINT uFlags = SND_SYNC; //option flags for sndPlaySound
HWND hButton;
HMENU hMenu;
LRESULT nCheckState;
char SoundBuff[256];
static fFirstTime = TRUE;
OPENFILENAME ofn; // common dialog box structure
char szDirName[256]; // directory string
static char szFile[256]; // filename string
char szFileTitle[256]; // file-title string
char szFilter[256]; // filter string
char chReplace; // string separator for szFilter
int i, cbString; // integer count variables
char szSelectFile[256]; // title of select file dialog
//first get default sound name from win.ini or registry
if (fFirstTime)
{
GetProfileString("Sounds", "SystemDefault", ",Default", SoundBuff, 256);
//get rid of everything after the filename in the ini string
i=0;
while(SoundBuff[i] != ',' && i<255)
{
i++;
}
SoundBuff[i] = 0;
if (i == 0)
{
lpszSoundName = NULL;
}
else
{
lpszSoundName = SoundBuff;
}
fFirstTime = FALSE;
}
hMenu = GetMenu(hwnd);
//if File|Exit is selected, quit
if(id == ID_FILE_EXIT)
{
PostQuitMessage (0);
}
//if Play button is clicked, play sound
if(id == IDC_BUTTON_PLAY)
{
sndPlaySound(lpszSoundName, uFlags);
}
//if Stop button is pushed, stop playing sound
if(id == IDC_BUTTON_STOP)
{
sndPlaySound(NULL, SND_SYNC);
}
//if File|Select File or the Select File button is selected, show the
//file open dialog and get the name of the file to play
if(id == ID_FILE_SELECT || id == IDC_BUTTON_OPEN)
{
//Set up structure for file dialog
GetWindowsDirectory(szDirName, sizeof(szDirName));
szFile[0] = '\0';
LoadString(NULL, IDS_SELECT_FILE, szSelectFile, sizeof(szSelectFile));
cbString = LoadString(NULL, IDS_FILTERSTRING, szFilter, sizeof(szFilter));
chReplace = szFilter[cbString - 1];
for (i = 0; szFilter[i] != '\0'; i++)
{
if (szFilter[i] == chReplace)
szFilter[i] = '\0';
}
ofn.lStructSize = sizeof(OPENFILENAME);
ofn.hwndOwner = hwnd;
ofn.lpstrFilter = szFilter;
ofn.lpstrCustomFilter = NULL;
ofn.nFilterIndex = 1;
ofn.lpstrFile = szFile;
ofn.nMaxFile = sizeof(szFile);
ofn.lpstrFileTitle = szFileTitle;
ofn.nMaxFileTitle = sizeof(szFileTitle);
ofn.lpstrInitialDir = szDirName;
ofn.lpstrTitle = szSelectFile;
ofn.lpstrDefExt = NULL;
ofn.Flags = OFN_SHAREAWARE | OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
//Put up Open File dialog to get filename
if (GetOpenFileName(&ofn))
{
lpszSoundName = ofn.lpstrFile;
hButton = GetDlgItem(hwnd, IDC_EDIT_FILE);
SendMessage(hButton, WM_SETTEXT, 0, (LPARAM)ofn.lpstrFileTitle);
}
}
//if Help|About is selected, show the About SoundApp dialog
if(id == ID_HELP_ABOUT)
{
FARPROC lpfnAbout;
lpfnAbout = MakeProcInstance((FARPROC)AboutDlgProc, hInst);
DialogBox(hInst, MAKEINTRESOURCE(IDD_DIALOG_ABOUT), hwnd, (DLGPROC)lpfnAbout);
FreeProcInstance(lpfnAbout);
}
//if Options|Sync or the Sync button is selected, set checks and flags
if(id == IDC_SYNC || id == ID_OPTIONS_SYNC)
{
hButton = GetDlgItem(hwnd, IDC_SYNC);
nCheckState = SendMessage(hButton, BM_GETCHECK, 0, 0);
//if Synchronous ws unchecked
if (nCheckState == 0)
{
//check Synchronous checkbox, uncheck Asynchronous checkbox,
//check Synchronous menu, uncheck Asynchronous menu,
//uncheck Loop checkbox and menu,
//disable Loop checkbox and menu,
//disable Stop button, and set sndPlaySound flags.
SendMessage(hButton, BM_SETCHECK, 1, 0);
SendMessage(GetDlgItem(hwnd, IDC_ASYNC),BM_SETCHECK, 0, 0);
CheckMenuItem(hMenu, ID_OPTIONS_SYNC,MF_CHECKED);
CheckMenuItem(hMenu, ID_OPTIONS_ASYNC, MF_UNCHECKED);
SendMessage(GetDlgItem(hwnd, IDC_LOOP), BM_SETCHECK, 0, 0);
CheckMenuItem(hMenu, ID_OPTIONS_LOOP,MF_UNCHECKED);
EnableWindow(GetDlgItem(hwnd, IDC_LOOP), FALSE);
EnableMenuItem(hMenu, ID_OPTIONS_LOOP, MF_DISABLED | MF_GRAYED);
EnableWindow(GetDlgItem(hwnd, IDC_BUTTON_STOP), FALSE);
uFlags = uFlags & ~SND_ASYNC & ~SND_LOOP;
}
}
//if Options|Async or the Async button is selected, set checks and flags
if(id == IDC_ASYNC || id == ID_OPTIONS_ASYNC)
{
hButton = GetDlgItem(hwnd, IDC_ASYNC);
nCheckState = SendMessage(hButton, BM_GETCHECK, 0, 0);
//if Asynchronous was unchecked
if (nCheckState == 0)
{
//check Asynchronous checkbox, uncheck Synchronous checkbox,
//check Asynchronous menu, uncheck Synchronous menu,
//enable Loop checkbox and menu,
//enable Stop button, and set sndPlaySound flags.
SendMessage(hButton, BM_SETCHECK, 1, 0);
SendMessage(GetDlgItem(hwnd, IDC_SYNC),BM_SETCHECK, 0, 0);
CheckMenuItem(hMenu, ID_OPTIONS_ASYNC,MF_CHECKED);
CheckMenuItem(hMenu, ID_OPTIONS_SYNC, MF_UNCHECKED);
EnableWindow(GetDlgItem(hwnd, IDC_LOOP), TRUE);
EnableMenuItem(hMenu, ID_OPTIONS_LOOP, MF_ENABLED);
EnableWindow(GetDlgItem(hwnd, IDC_BUTTON_STOP), TRUE);
uFlags = uFlags | SND_ASYNC;
}
}
//if Options|NoDefault or the NoDefault button is selected, set checks and flags
if(id == ID_OPTIONS_NODEFAULT || id == IDC_NODEFAULT)
{
hButton = GetDlgItem(hwnd, IDC_NODEFAULT);
nCheckState = SendMessage(hButton, BM_GETCHECK, 0, 0);
//if NoDefault was unchecked
if (nCheckState == 0)
{
//check NoDefault checkbox and menu, and set sndPlaySound flags.
SendMessage(hButton, BM_SETCHECK, 1, 0);
CheckMenuItem(hMenu, ID_OPTIONS_NODEFAULT, MF_CHECKED);
uFlags = uFlags | SND_NODEFAULT;
}
else
{
//uncheck NoDefault checkbox and menu, and set sndPlaySound flags.
SendMessage(hButton, BM_SETCHECK, 0, 0);
CheckMenuItem(hMenu, ID_OPTIONS_NODEFAULT, MF_UNCHECKED);
uFlags = uFlags & ~SND_NODEFAULT;
}
}
//if Options|Loop or the Loop button is selected, set checks and flags
if(id == ID_OPTIONS_LOOP || id == IDC_LOOP)
{
hButton = GetDlgItem(hwnd, IDC_LOOP);
nCheckState = SendMessage(hButton, BM_GETCHECK, 0, 0);
//if Loop was unchecked
if (nCheckState == 0)
{
//check Loop checkbox and menu, and set sndPlaySound flags.
SendMessage(hButton, BM_SETCHECK, 1, 0);
CheckMenuItem(hMenu, ID_OPTIONS_LOOP,MF_CHECKED);
uFlags = uFlags | SND_LOOP;
}
else
{
//uncheck Loop checkbox and menu, and set sndPlaySound flags.
SendMessage(hButton, BM_SETCHECK, 0, 0);
CheckMenuItem(hMenu, ID_OPTIONS_LOOP,MF_UNCHECKED);
uFlags = uFlags & ~SND_LOOP;
}
}
//if Options|NoStop or the NoStop button is selected, set checks and flags
if(id == ID_OPTIONS_NOSTOP || id == IDC_NOSTOP)
{
hButton = GetDlgItem(hwnd, IDC_NOSTOP);
nCheckState = SendMessage(hButton, BM_GETCHECK, 0, 0);
//if NoStop was unchecked
if (nCheckState == 0)
{
//check NoStop checkbox and menu, and set sndPlaySound flags.
SendMessage(hButton, BM_SETCHECK, 1, 0);
CheckMenuItem(hMenu, ID_OPTIONS_NOSTOP,MF_CHECKED);
uFlags = uFlags | SND_NOSTOP;
}
else
{
//uncheck NoStop checkbox and menu, and set sndPlaySound flags.
SendMessage(hButton, BM_SETCHECK, 0, 0);
CheckMenuItem(hMenu, ID_OPTIONS_NOSTOP,MF_UNCHECKED);
uFlags = uFlags & ~SND_NOSTOP;
}
}
}
/////////////////////////////////////////////////////////////////////////////
//AboutDlgProc
//
//Purpose: Calls AboutDlgProc2
//This makes it possible to use messge crackers in the dialog procedure
//
//Parameters:HWND hdlg, UINT mMsg, WPARAM wParam, LPARAM lParam
//
//Returns: BOOL
///////////////////////////////////////////////////////////////////////////////
BOOL CALLBACK AboutDlgProc(
HWND hdlg,
UINT mMsg,
WPARAM wParam,
LPARAM lParam)
{
CheckDefDlgRecursion(&bRecursing);
return(SetDlgMsgResult(hdlg, mMsg, AboutDlgProc2(hdlg, mMsg, wParam, lParam)));
}
/////////////////////////////////////////////////////////////////////////////
//AboutDlgProc2
//
//Purpose: handle messages to the About dialog
//
//Parameters: HWND hdlg, UINT mMsg, WPARAM wParam, LPARAM lParam
//
//Returns: LRESULT
///////////////////////////////////////////////////////////////////////////////
LRESULT AboutDlgProc2(
HWND hdlg,
UINT mMsg,
WPARAM wParam,
LPARAM lParam)
{
switch(mMsg)
{
HANDLE_MSG(hdlg, WM_INITDIALOG, About_OnInitDialog);
HANDLE_MSG(hdlg, WM_COMMAND, About_OnCommand);
default:
return(DefDlgProcEx(hdlg, mMsg, wParam, lParam, &bRecursing));
}
}
/////////////////////////////////////////////////////////////////////////
//About_OnInitDialog
//
//Purpose: Initialize About dialog. Set focus to the OK button.
//
//Parameters: HWND hdlg, HWND hwndFocus, LPARAM lParam
//
//Returns: TRUE
//////////////////////////////////////////////////////////////////////
BOOL About_OnInitDialog(HWND hdlg, HWND hwndFocus, LPARAM lParam)
{
SetFocus(GetDlgItem(hdlg, IDOK));
return TRUE;
}
/////////////////////////////////////////////////////////////////////////
//About_OnCommand
//
//Purpose: Closes the About dialog when the OK button is clicked
//
//Parameters: HWND hdlg, int id, HWND hwndCtl, UINT codeNotify
//
//Returns: BOOL
//////////////////////////////////////////////////////////////////////
BOOL About_OnCommand(HWND hdlg, int id, HWND hwndCtl, UINT codeNotify)
{
if(id == IDOK)
{
EndDialog(hdlg, TRUE);
return TRUE;
}
return FALSE;
}