Playsound problem

Hi, im veri new to windows programming and im stucked with a problem with playsound.

Code:

switch (message)
{	
	HINSTANCE hinstance;
     	case WM_LBUTTONDOWN:
	PlayWav(hinstance);
	break;
.....
}

void PlayWav(HINSTANCE hinstance)
{
	PlaySound((LPCSTR)IDR_SELECT, hinstance, SND_ASYNC | SND_RESOURCE);
}

this is a function i made for testing sounds, it compiled alrite but when i run it, i got an error:
sound.obj : error LNK2001: unresolved external symbol __imp__PlaySoundA@12
Debug/Sound.exe : fatal error LNK1120: 1 unresolved externals
What is the problem ? I also tried a very basic code

Code:

PlaySound("wave.wav",  NULL, SND_ASYNC | SND_FILENAME);

Gave me the same runtime error. PLEASE HELP !

You need to link with Winmm.lib (-lwinmm for MinGW/Dev-Cpp).

See your compiler documentations for the specifics of how to link with additional libraries.

If you haven't already done so you may have to #include Mmsystem.h, too.

For future reference, the lib information (and header) is included in the msdn page for the api, for example see the bottom of the page for PlaySound.

Ken, Can you teach me how to include that lib for visual C++ ? i can't find any documents on libs but im sure i came across it before.

at the beginning, put this in:

Code:

#include <Mmsystem.h>

pragma once(lib, Winmm.lib)

There is some other way to do it for MSVC++ but this works and its easy enough, right?

Here is an example of linking with multiple libraries. We check that we are on MSVC so that the #pragmas do not cause problems on other compilers. This is typically placed just below your #includes.

Code:

#if defined(_MSC_VER)
#pragma comment(lib, "winmm.lib")
#pragma comment(lib, "shlwapi.lib")
#endif

Guys, i did all u u asked me to about adding the new header file and the new lib but i still got the same runtime error
sound.obj : error LNK2001: unresolved external symbol __imp__PlaySoundA@12
Debug/Sound.exe : fatal error LNK1120: 1 unresolved externals

Code:

		HINSTANCE hinstance;
     	case WM_LBUTTONDOWN:
			PlayWav(hinstance);
			break;

Code:

// Function.h
#include <Windows.h>
#include <Mmsystem.h>
#pragma once(lib, Winmm.lib)

void PlayWav(HINSTANCE hinstance)
{
	PlaySound((LPCSTR)IDR_SELECT, hinstance, SND_ASYNC | SND_RESOURCE);
}

might wanna try

#pragma comment(lib, "winmm.lib")

instead of

#pragma once(lib, Winmm.lib)

anonytmouse
X PaYnE X
THANX FOR YOUR HELP !!! IT FINALLY WORK, but could you explain what the predecessor #pragma means ? I got this from MSDN.
The #pragma directives offer a way for each compiler to offer machine- and operating system-specific features while retaining overall compatibility with the C and C++ languages. Pragmas are machine- or operating system-specific by definition, and are usually different for every compiler.
I don't really get what they mean. Anyway, how do i know when i need to include a new .lib like in this case ?

usually when you get an error like the one you got

sound.obj : error LNK2001: unresolved external symbol __imp__PlaySoundA@12
Debug/Sound.exe : fatal error LNK1120: 1 unresolved externals

it means that the function you are trying to call isnt defined, and since this isnt a function you wrote, it probably needs a library.

if you have a win32 api reference (or you can use MSDN), you can look up PlaySound and it will tell you what header files/library(s) you need to include.

I am having the same problem.. using MinGW/Dev-Cpp

You need to link with Winmm.lib (-lwinmm for MinGW/Dev-Cpp)

Code:

#include <windows.h>
#include <Mmsystem.h>

#pragma comment(lib, "-lwinmm")

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
{
     static TCHAR szAppName[] = TEXT ("HelloWin") ;
     HWND         hwnd ;
     MSG          msg ;
     WNDCLASS     wndclass ;

     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
     wndclass.lpfnWndProc   = WndProc ;
     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
     wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
     wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
     wndclass.lpszMenuName  = NULL ;
     wndclass.lpszClassName = szAppName ;

     if (!RegisterClass (&wndclass))
     {
          MessageBox (NULL, TEXT ("This program requires Windows NT!"), 
                      szAppName, MB_ICONERROR) ;
          return 0 ;
     }
     
     hwnd = CreateWindow (szAppName,                  // window class name
                          TEXT ("The Hello Program"), // window caption
                          WS_OVERLAPPEDWINDOW,        // window style
                          CW_USEDEFAULT,              // initial x position
                          CW_USEDEFAULT,              // initial y position
                          CW_USEDEFAULT,              // initial x size
                          CW_USEDEFAULT,              // initial y size
                          NULL,                       // parent window handle
                          NULL,                       // window menu handle
                          hInstance,                  // program instance handle
                          NULL) ;                     // creation parameters
     
     ShowWindow (hwnd, iCmdShow) ;
     UpdateWindow (hwnd) ;
     
     while (GetMessage (&msg, NULL, 0, 0))
     {
          TranslateMessage (&msg) ;
          DispatchMessage (&msg) ;
     }
     return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
     HDC         hdc ;
     PAINTSTRUCT ps ;
     RECT        rect ;
     
     switch (message)
     {
     case WM_CREATE:
          PlaySound("hellowin.wav", NULL,  SND_ASYNC) ;
          return 0 ;        

     case WM_PAINT:
          hdc = BeginPaint (hwnd, &ps) ;
          
          GetClientRect (hwnd, &rect) ;
          
          DrawText (hdc, TEXT ("Hello, Windows 98!"), -1, &rect,
                    DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;
          
          EndPaint (hwnd, &ps) ;
          return 0 ;
          
     case WM_DESTROY:
          PostQuitMessage (0) ;
          return 0 ;
     }
     return DefWindowProc (hwnd, message, wParam, lParam) ;
}

I have also tried sndPlaySound("Hellowwin.wav", SND_ASYNC);


[Linker error] undefined reference to `PlaySoundA@8'
ld returned 1 exit status
F:\Dev-Cpp\Makefile.win [Build Error] [hi.exe] Error 1

I haven't used MinGW, but isn't it a more console based compiler run by a DOS-like command? If this is the case I believe when you run MinGW then you would use the -lwinmm as a parameter (such as: c:\>mingw -lwinmm code.c or whatever the command would be).

Hopefully this will help, correct me if I'm wrong.

Originally Posted by The Brain

I have also tried sndPlaySound("Hellowwin.wav", SND_ASYNC);

[Linker error] undefined reference to `PlaySoundA@8'
ld returned 1 exit status
F:\Dev-Cpp\Makefile.win [Build Error] [hi.exe] Error 1

You know, I have the exact same problem, but I don't use MinGW. I use Dev-C++.
Any help there cyreon? . vbmenu_register("postmenu_472085", true);

I believe you would have a similar fix for your problem as I described above. You can definitely check in your compiler's documentation and it should explain more about including additional library files in your projects.

I have done all my C programming in MSVC++ so I have yet to use any other compiler. Sorry I can't be of more help (at least with a specific fix that you could use).

Hey guys thank you big time.....
If it werent for God who directed me to this page that showed the solution as

# pragma comment(lib,"winmm.lib")

i wouldnt have got my assignment problem solved......
thank you guys once again and remember....

16"For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life. 17For God did not send his Son into the world to condemn the world, but to save the world through him".
From the book of John chapter 3 verses 16 to 17

Thanx to you guys.........