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C-/C++-Quelltext

#include <windows.h>
#include <DShow.h>
#include "Resource.h"

IGraphBuilder*  g_pGraph;
IMediaControl*  g_pControl;
IBasicAudio*    g_pBasicAudio;
IMediaSeeking*  g_pSeeking;
char* g_pcFileName="Music.MP3";

HRESULT InitMusic()
{
    if (FAILED(CoCreateInstance(CLSID_FilterGraph,NULL,CLSCTX_INPROC,IID_IGraphBuilder,
                            (void**)&g_pGraph)))
    {
        return E_FAIL;
    }

    WCHAR g_awcFileName[256];
    MultiByteToWideChar(CP_ACP,0,"Sound.WAV",-1,g_awcFileName,256);
    
    if(FAILED(g_pGraph->RenderFile(g_awcFileName, NULL)))
    {
        return E_FAIL;
    }

    g_pGraph->QueryInterface(IID_IMediaControl,(void**)(&g_pControl));
    g_pGraph->QueryInterface(IID_IMediaSeeking,(void**)(&g_pSeeking));
    g_pGraph->QueryInterface(IID_IBasicAudio,(void**)(&g_pBasicAudio));
    if (!g_pControl || !g_pBasicAudio || !g_pSeeking) return E_FAIL;

    g_pSeeking->SetTimeFormat(&TIME_FORMAT_MEDIA_TIME);
    
    return S_OK;
}

BOOL CALLBACK DlgProc(HWND hWnd,UINT uiMsg,WPARAM wParam,LPARAM lParam)
{
    switch(uiMsg)
    {
    case WM_INITDIALOG: InitMusic();
                        break;
    case WM_ACTIVATE:   LONGLONG llPos;
                        llPos=0;
                        /*if (FAILED(g_pSeeking->SetPositions(&llPos,
                                    AM_SEEKING_AbsolutePositioning,
                                    NULL, AM_SEEKING_NoPositioning)))
                        {
                            MessageBox(NULL,"a",NULL,NULL);
                        }*/
                        if (FAILED(g_pControl->Run()))
                        {
                            MessageBox(NULL,NULL,NULL,NULL);
                        }
                        break;
    case WM_COMMAND:    switch(wParam)
                        {
                        case IDOK:      if (g_pGraph!=NULL)         g_pGraph->Release();
                                        if (g_pControl!=NULL)       g_pControl->Release();
                                        if (g_pBasicAudio!=NULL)    g_pBasicAudio->Release();
                                        if (g_pSeeking!=NULL)       g_pSeeking->Release();
                                        EndDialog(hWnd,0);
                                        break;
                        case IDC_PLAY:  
                                        break;
                                            
                        }
                        break;
    default:            return FALSE;
    }
    
    return TRUE;
}

int WINAPI WinMain(HINSTANCE hInst,HINSTANCE,LPSTR,int)
{
    DialogBox(hInst,MAKEINTRESOURCE(IDD_DIALOG),NULL,(DLGPROC)DlgProc);
    return 0;
}