ITracing::SetTraceLevel method

The SetTraceLevel method sets the tracing level for an object. Every object in the WDTF object model should support the SetTraceLevel method

Syntax


HRESULT SetTraceLevel(
  [in] TTraceLevel Level
);

Parameters

Level [in]

The new TTraceLevel value for this object.

Return value

SetTraceLevel returns a standard HRESULT value.

Remarks

For more information about tracing levels, see TTraceLevel and ITracer.

Use the Trace_Default level to set the object back to the settings that are defined in the registry for the object's co-class.

Because the IAction interface inherits from the ITracing interface, all WDTF Actions will support SetTraceLevel. All of the WDTF core interfaces should also support this method.

The following code example demonstrates how to use the SetTraceLevel method.

VBScript


'
' Get DeviceManagement Action interface for the target
'
Set Action = CDROM.GetInterface("DeviceManagement")
 
If Err.number <> 0 Then
    WScript.Echo Space(4) & "Failed to get interface DeviceManagement. Error Number:" & Err.number
Else            
    '
    ' Set the tracing level to HIGH
    '
    Action.SetTraceLevel(Trace3_High)
    If Err.number <> 0 Then
        WScript.Echo Space(4) & "Failed to set tracing level to 'High'. Error Number:" & Err.number
    End If

    '
    ' Disable the CD-ROM
    '
    WScript.Echo Space(4) & "Trying to disable device..."
 
    Action.Disable()
 
    If Err.number <> 0 Then
        WScript.Echo Space(4) & "Failed to disable the specified CDROM. Error     Number:" & Err.number & vbcrlf
    Else
        WScript.Echo Space(4) & "Specified CDROM successfully disabled." & vbcrlf
    End If
End If

C++


IDevMan* pDevMan;        // DeviceManagement Action interface

VARIANT vtEmpty;       // To be passed as a parameter to ITarget::GetInterface
VariantInit(&vtEmpty);

//
// Get DeviceManagement Action interface
//
hr = pCDROM->GetInterface(L"DeviceManagement", vtEmpty, vtEmpty, (IAction**)(&pDevMan));
if(FAILED(hr))
{
    _tprintf(_T("\n  Failed to get DeviceManagement Interface for specified CDROM Device. Error: 0x%x"), hr);
 goto Cleanup;
}

//
// Set the trace level to High
//
hr = pDevMan->SetTraceLevel(Trace3_High);
if(FAILED(hr))
{
    _tprintf(_T("\n  Failed to set tracing level to 'High'. Error: 0x%x"), hr);
}
 
//
// Disable the CD-ROM
//
_tprintf(_T("\n  Trying to disable device..."));

hr = pDevMan->Disable();
if(FAILED(hr))
{
    _tprintf(_T("\n  Failed to disable the specified CDROM. Error: 0x%x"), hr);
}
else
{
    _tprintf(_T("\n  Specified CDROM successfully disabled."));
}

See also

ITracer
ITracing
TTraceLevel

 

 

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