| Microsoft DirectX 8.1 (C++) |
The IsParamSupported method determines whether the track supports a given data type in the IDirectMusicTrack8::GetParam and IDirectMusicTrack8::SetParam methods.
Syntax
HRESULT IsParamSupported(
REFGUID rguidType
);
Parameters
rguidType
Reference to (C++) or address of (C) the identifier of the type of data. See Standard Track Parameters.
Return Values
If the method succeeds and the type is supported, the return value is S_OK.
If it fails, the method can return one of the error values shown in the following table.
| Return code |
| DMUS_E_TYPE_DISABLED |
| DMUS_E_TYPE_UNSUPPORTED |
| E_POINTER |
| E_NOTIMPL |
Remarks
If a parameter has been disabled by using one of the SetParam methods, the IDirectMusicTrack8::IsParamSupported method returns DMUS_E_TYPE_DISABLED when passed the corresponding parameter type (either GUID_TempoParam or GUID_TimeSignature).
The method also returns DMUS_E_TYPE_DISABLED if passed GUID_DisableTempo when that parameter has already been disabled, or if passed GUID_EnableTempo when that parameter is currently enabled. The same is true for GUID_DisableTimeSig and GUID_EnableTimeSig.
The method returns DMUS_E_TYPE_UNSUPPORTED when the track does not support the parameter referred to by a GUID_EnableTempo, GUID_EnableTimeSig, GUID_DisableTempo, or GUID_DisableTimeSig parameter call.
Requirements
Header: Declared in dmplugin.h.
See Also