UdecxUrbRetrieveBuffer function (udecxurb.h)

Retrieves the transfer buffer of an URB from the specified framework request object sent to the endpoint queue.

Syntax

NTSTATUS UdecxUrbRetrieveBuffer(
  [in]  WDFREQUEST Request,
  [out] PUCHAR     *TransferBuffer,
  [out] PULONG     Length
);

[in] Request

A handle to a framework request object that contains the URB for the transfer.

[out] TransferBuffer

A pointer to a buffer that receives the transfer buffer of an URB.

[out] Length

A ULONG variable that receives the length of the buffer pointer to by TransferBuffer.

The method returns STATUS_SUCCESS if the operation succeeds. Otherwise, this method might return an appropriate NTSTATUS error code.

Return code	Description
STATUS_INVALID_PARAMETER	The URB does not contain a transfer buffer.
STATUS_INSUFFICIENT_RESOURCES	The transfer buffer MDL was not valid.