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IWMDMLogger::IsEnabled

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The IsEnabled method determines whether logging is enabled.

Syntax

HRESULT IsEnabled(BOOL*pfEnabled);

Parameters

pfEnabled

[out]  Pointer to a flag that is true on output if logging is enabled.

Return Values

The method returns an HRESULT. All the interface methods in Windows Media Device Manager can return any of the following classes of error codes:

  • Standard COM error codes
  • Windows error codes converted to HRESULT values
  • Windows Media Device Manager error codes

For an extensive list of possible error codes, see Error Codes.

Possible values include, but are not limited to, those in the following table.

Return code Description
S_OK The method succeeded.
E_INVALIDARG A parameter is invalid or is a NULL pointer.
E_FAIL An unspecified error occurred.

Remarks

The file WmdmLog.idl is the IDL source code for WmdmLog.dll. This file is processed by the MIDL tool to produce the type library (WmdmLog.tlb) and marshaling code.

Example Code

// Create logging object.
CoCreateInstance(CLSID_WMDMLogger, NULL, CLSCTX_ALL, __uuidof(IWMDMLogger), (void**)&m_pLogger);
BOOL enabled = FALSE;
hr = m_pLogger->IsEnabled(&enabled);
// TODO: Display a message that logging is either enabled or disabled.
if(!enabled)
{
    if(m_pLogger->Enable(TRUE) != S_OK)
        m_pLogger = NULL;
}

Requirements

Header: Defined in wmdmlog.idl.

Library: mssachlp.lib

See Also