IBidiSpl::SendRecv method (bidispl.h)

The SendRecv method sends a bidi request to the printer.

Syntax

HRESULT SendRecv(
  [in] const LPCWSTR pszAction,
  [in] IBidiRequest  *pRequest
);

[in] pszAction

A pointer to a NULL-terminated string that specifies the action for this bidi request. It can be one of the following constants.

Constant	Value	Description
BIDI_ACTION_ENUM_SCHEMA	L"EnumSchema"	Enumerate the schema. The returned data will be a list of schema that the port monitor or print provider supports.
BIDI_ACTION_GET	L"Get"	Get the value of a specified schema.
BIDI_ACTION_GET_ALL	L"GetAll"	Get the values of all child nodes of the specified schema.
BIDI_ACTION_SET	L"Set"	Set a value of the schema.
BIDI_ACTION_GET_WITH_ARGUMENT	L"GetWithArgument"	Request the bidi schema value using the data set as input argument.

[in] pRequest

A pointer to a single bidi request.

The method returns one of the following values.

Value	Description
S_OK	The operation was successfully carried out.
E_HANDLE	The interface handle was invalid.
None of the above	The HRESULT contains an error code corresponding to the last error.

Note that the HRESULT may contain a system error code defined in Bidi Error Codes.

The BIDI_ACTION_* values are case insensitive strings.