FltGetTransactionContext function (fltkernel.h)
The FltGetTransactionContext routine retrieves a context that was set for a transaction by a given minifilter driver.
Syntax
NTSTATUS FLTAPI FltGetTransactionContext(
[in] PFLT_INSTANCE Instance,
[in] PKTRANSACTION Transaction,
[out] PFLT_CONTEXT *Context
);
Parameters
[in] Instance
Opaque instance pointer for the caller.
[in] Transaction
Opaque transaction pointer for the transaction whose context is being retrieved.
[out] Context
Pointer to a caller-allocated variable that receives the address of the transaction context.
Return value
FltGetTransactionContext returns STATUS_SUCCESS or an appropriate NTSTATUS value, such as the following:
| Return code | Description |
|---|---|
| STATUS_NOT_FOUND | No matching context was found. This is an error code. |
Remarks
For more information about contexts, see About minifilter contexts.
FltGetTransactionContext increments the reference count on the context that the Context parameter points to. When this context pointer is no longer needed, the caller must decrement its reference count by calling FltReleaseContext. Thus every successful call to FltGetTransactionContext must be matched by a subsequent call to FltReleaseContext.
To set a context for a transaction, call FltSetTransactionContext.
To allocate a new transaction context, call FltAllocateContext.
To delete a transaction context, call FltDeleteTransactionContext or FltDeleteContext.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Universal |
| Header | fltkernel.h (include Fltkernel.h) |
| Library | FltMgr.lib |
| DLL | FltMgr.sys |
| IRQL | <= APC_LEVEL |