🚀 go-pugleaf

Hi

I'm trying to open the format choose dialog box within my application, using
the Windows API calls and source cose directly from MSDN on CBuilder 5 Pro.
When I run my app, and I click the button that is supposed to open die
dialog, my app goes into debug mode, showing the CPU window with the
assemebler code, and highlights the "ret" line just above
"ntdll.DbgUserBreakPoint". The code looks as follow:

void __fastcall TForm1::Button1Click(TObject *Sender)
{
MMRESULT            mmr;
ACMFORMATCHOOSE     afc;
WAVEFORMATEX        wfxSelection;
WAVEFORMATEX        wfxEnum;

// Initialize the ACMFORMATCHOOSE members.
memset(&afc, 0, sizeof(afc));

afc.cbStruct    = sizeof(afc);
afc.fdwStyle    = 0L;               // no special style flags
afc.hwndOwner   = Form1->Handle;             // hwnd of parent window
afc.pwfx        = &wfxSelection;    // wfx to receive selection
afc.cbwfx       = sizeof(wfxSelection);
afc.pszTitle    = TEXT("16 Bit PCM Selection");

//  Request that all 16-bit PCM formats be displayed for the user
//  to select from.
memset(&wfxEnum, 0, sizeof(wfxEnum));
wfxEnum.wFormatTag = WAVE_FORMAT_PCM;
wfxEnum.wBitsPerSample = 16;
afc.fdwEnum = ACM_FORMATENUMF_WFORMATTAG |
    ACM_FORMATENUMF_WBITSPERSAMPLE;
afc.pwfxEnum = &wfxEnum;
mmr = acmFormatChoose(&afc);
if ((MMSYSERR_NOERROR != mmr) && (ACMERR_CANCELED != mmr))
{
    // There was a fatal error in bringing up the list
    // dialog box (probably invalid input parameters).
}


}


Why is it doing this? Does anyone know of any tutorial on the ACM that will
make any sense? MSDN gives some pretty screwed up information that I find
very difficult to comprehend.

Thanks in advance.
--
Regards,
Werner Soekoe
WernerS@fsl.gov.za