KsCreatePin function (ks.h)

The KsCreatePin function passes a connection request to a device, creating a pin instance. This function can only be called at PASSIVE_LEVEL for kernel-mode clients.

Syntax

KSDDKAPI NTSTATUS KsCreatePin(
  [in]  HANDLE         FilterHandle,
  [in]  PKSPIN_CONNECT Connect,
  [in]  ACCESS_MASK    DesiredAccess,
  [out] PHANDLE        ConnectionHandle
);

Parameters

[in] FilterHandle

Specifies the handle of the filter initiating the create request and where the connection will occur.

[in] Connect

Pointer to a KSPIN_CONNECT structure that contains parameters for the requested connection. This should be followed in memory by a KSDATAFORMAT data structure, describing the data format requested for the connection.

[in] DesiredAccess

Specifies the access desired to the pin. This is typically GENERIC_READ or GENERIC_WRITE. For data flowing into the pin this value should be set to GENERIC_WRITE, and for data flowing out of the pin this should be set to GENERIC_READ regardless of the communication method.

[out] ConnectionHandle

Specifies the connection handle passed. The routine fills this in with a handle to the file object of the created connection. This value can then be used to disconnect with the CloseHandle function.

Return value

The KsCreatePin function returns STATUS_SUCCESS if the connection was successful, or it returns an error if the connection failed. Additionally, this Win32 error code (from Winerror.h) can be returned:

Remarks

The routine sends an IRP_MJ_CREATE request to the driver. The driver accepts the request only if the interface, medium, and data format are compatible.

If Connect->PinToHandle is NULL, KsCreatePin creates a pin the caller can use to send requests to the streaming driver specified in Connect->FilterHandle. Connect->PinId determines the pin type of the pin to be created.

Requirements

See also

IRP_MJ_CREATE

KSDATAFORMAT

KSPIN_CONNECT