PRB: WAVEUI Component Doesn't Receive FORMATCHOOSE_FORMAT_VERIFY (290340)
The information in this article applies to:
- Microsoft Windows CE Operating System, Versions 3.0
- Microsoft Windows CE Operating System, Versions 2.12
- Microsoft Windows CE Operating System, Versions 2.11
- Microsoft Windows CE Platform Builder 2.11
- Microsoft Windows CE Platform Builder 2.12
- Microsoft Windows CE Platform Builder 3.0
This article was previously published under Q290340 SYMPTOMS
A replacement WAVEUI component doesn't receive FORMATCHOOSE_FORMAT_VERIFY messages. FORMATCHOOSE_FORMAT_VERIFY is used to determine which waveform-audio formats will be displayed when acmFormatChoose is called.
RESOLUTION
The following solution can be incorporated into the custom WAVUI component's AcmDlgProc to allow FORMATCHOOSE_FORMAT_VERIFY messages to be generated:
if (uMsg == WM_INITDIALOG)
{
// ...
//
// This workaround is only valid for Windows CE 2.11, 2.12 and 3.0!
// Do not alter the code below.
//
OSVERSIONINFO ver;
GetVersionEx(&ver);
if (
(ver.dwMajorVersion == 2 && ver.dwMinorVersion == 11) ||
(ver.dwMajorVersion == 2 && ver.dwMinorVersion == 12) ||
(ver.dwMajorVersion == 3 && ver.dwMinorVersion == 0) ||
)
{
pdwInternal = (PDWORD) lParam;
if (pdwInternal && !pdwInternal[26])
{
pdwInternal[26] = 1;
pdwInternal[25] = 0;
}
}
}
// ...
}
MORE INFORMATION
An internal flag that is used to enable the FORMATCHOOSE_FORMAT_VERIFY messages is triggered by indication of a hook function when acmFormatChoose is called. Because the replacement component internally implements a hook procedure and the acmFormatChoose caller isn't necessarily aware of this, the solution provided in this article forces this internal flag to enable the message.
| Modification Type: | Minor | Last Reviewed: | 8/18/2005 |
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| Keywords: | kbprb KB290340 |
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