Zebra Technologies P1061668-001 DirectIO Method, Opossuccess, Direct I/O successful, Other Values

Kiosk Modifications of the OLE for Retail POS DirectIO Method

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DirectIO Method

Syntax LONG DirectIO (LONG Command, LONG* pData, BSTR* pString);

Parameters This table identifies the parameters for this format:

Parameter	Description
Command	Command number. 0 is the only valid option for the Kiosk
	printers and then you can send any valid ESC commands with
	the exception of status enquiries or data to the printer in the
	pString buffer.
	pData is set to the amount of bytes in pString.
pData	Pointer to additional numeric data. Set to the amount of bytes
	in pString.
pString	Pointer to additional string of valid ESC commands or data.
	The data format has to comply with the data format specified
	in the Kiosk printers Technical Manual. It is recommended to
	only use printer parameter set commands since the printing is
	implemented through the Kiosk Printer Windows Driver.

Remarks Call to communicate directly with the Service Object.

This method provides a means for a Service Object to provide functionality to the application that is not otherwise supported by the standard Control Object for its device class. Depending upon the Service Object’s definition of the command, this method may be asynchronous or synchronous.

Use of DirectIO will make an application non-portable. The application may, however, maintain portability by performing DirectIO calls within conditional code. This code may be based upon the value of the ServiceObjectDescription, DeviceDescription, or DeviceName property.

Return One of the following values is returned by the method and placed in the ResultCode property:

Value	Meaning
OPOS_SUCCESS	Direct I/O successful.
Other Values	See ResultCode.

The use of DirectIO has one valid command entry.

DirectIO (0, BufferLength, Buffer)

11/25/2013 OPOS Driver User Guide P1061668-001 Rev. A