FltStartFiltering function
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FltStartFiltering starts filtering for a registered minifilter driver.
Syntax
NTSTATUS FLTAPI FltStartFiltering( PFLT_FILTER Filter );
Parameters
Filter
Opaque filter pointer returned by FltRegisterFilter.
Return value
FltStartFiltering returns STATUS_SUCCESS or an appropriate NTSTATUS value such as the following:
| Return code | Description |
|---|---|
|
Filtering was already started for this minifilter driver. This is an error code. |
Remarks
A minifilter driver typically calls FltStartFiltering from its DriverEntry routine after it has completed its global initialization and called FltRegisterFilter. FltStartFiltering notifies the Filter Manager that the minifilter driver is ready to begin attaching to volumes and filtering I/O requests. After the minifilter driver calls this routine, the Filter Manager treats the minifilter driver as a fully active minifilter driver, presenting it with volumes to attach to, as well as I/O requests. The minifilter driver must be prepared to begin receiving these notifications and I/O requests even before FltStartFiltering returns.
Requirements
| Target Platform | Universal |
| Header | fltkernel.h (include Fltkernel.h) |
| Library | FltMgr.lib |
| DLL | Fltmgr.sys |
| IRQL | <= APC_LEVEL |