Please help. How do i use acmFormatEnum?

[redeemer]

I'm trying to enumerate all the different formats for a specific format type, but every time i run the acmFormatEnum function it returns MMSYSERR_INVALPARAM meaning "At least one parameter is invalid.". Anyone know how to use that function? Anyone have some examples? All help is greatly appreciated, here's my code. I start by running the TagEnum function:

ACMFORMATTAGDETAILS acmTagDetails;

void TagEnum()
{
HACMDRIVER hAcm;

acmDriverOpen(&hAcm, id, 0);

acmTagDetails.cbStruct = sizeof(ACMFORMATTAGDETAILS);
acmFormatTagEnum(hAcm, &acmTagDetails, acmTagCallback, NULL, 0);

acmDriverClose(hAcm, 0);

}

BOOL WINAPI acmTagCallback(HACMDRIVERID hadid, LPACMFORMATTAGDETAILS paftd, DWORD dwInstance,DWORD fdwSupport)
{
ACMFORMATDETAILS acmFormat;
WAVEFORMATEX waveFormat = { 0 };
HACMDRIVER hAcm;

memset(&acmFormat, 0, sizeof(acmFormat));
acmFormat.cbStruct = sizeof(acmFormat);
acmFormat.cbwfx = sizeof(waveFormat);
acmFormat.pwfx = &waveFormat;
acmFormat.dwFormatTag = acmTagDetails.dwFormatTag;

waveFormat.wFormatTag = acmTagDetails.dwFormatTag;

acmDriverOpen(&hAcm, hadid, 0);
acmFormatEnum(hAcm, &acmFormat, formatCallback, NULL, ACM\_FORMATENUMF\_WFORMATTAG);
acmDriverClose(hAcm, 0);

return TRUE;

}

BOOL WINAPI formatCallback(HACMDRIVERID hadid, LPACMFORMATDETAILS pafd, DWORD dwInstance, DWORD fdwSupport)
{
ACMDRIVERDETAILS details;

details.cbStruct = sizeof(details);

acmDriverDetails(hadid, &details, NULL);

SendMessage(GetDlgItem(ghWnd, IDC\_FORMATS), LB\_INSERTSTRING, 0, (LPARAM)details.szLongName);

return TRUE;

}

id is a HACMDRIVERID holding a valid driver id of a driver. Anyone have a clue what could be wrong or have some examples? All help is apprecaited. -Rune Svendsen

[Mike Nordell]

Doesn't the MSDN sample ACMapp display how to do this???