ITracer::GetBits method (wdtf.h)
The GetBits method returns the set of tracing flags for a coclass as a bit mask, given a specified TTraceLevel value and the CLSID of the coclass.
Syntax
HRESULT GetBits(
[in] CLSID ClassID,
[in] TTraceLevel Level,
[out, retval] DWORD *pBits
);
Parameters
[in] ClassID
The CLSID of the co-class of the object that is requesting the tracing bit mask. This parameter causes the interface's TraceLevel Path to be defined as HKCR\CLSID<ClassID>.
[in] Level
The tracing level that is requested. A value of Trace_Default indicates that GetBits will search the interface's TraceLevel Path for the default level. TraceLevel Path is specified by using either ClassID or pszTraceLevelPath. .
[out, retval] pBits
The returned set of flags as a bit mask.
Return value
GetBits returns a standard HRESULT value.
Remarks
The GetBits method is intended for low-level WDTF usage. If you want to change the trace level of an object at runtime, see ITracing.
If no default trace level exists, this method fails.
If GetBits fails for any reason, the caller is expected to silently continue to use the tracing bit mask of its creator.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Desktop |
| Header | wdtf.h |