User's Manual Part 1

Scanner SupportChapter —6

164 700 Series Color Mobile Computer User’s Manual

IBarCodeReaderControl::QueryAttribute

This function retrieves the device-specific grid, the scanner enable status,

and the LED control status for the current bar code reader engine.

Syntax

HRESULT IBarCodeReaderControl::QueryAttribute (

ITC_BARCODEREADER_ATTRIBUTE_ID eAttr, BYTE rgbAttrBuffer[],

DWORD dwAttrBufferSize );

Parameters

eAttr [in] Specifies the attribute. See

IBarCodeReaderControl::SetAttribute on

page 167 for the attributes.

rgbAttrBuffer [out] Contains buffer for the attribute to be

queried. The structure of rgbAttrBuffer

depends on the attribute being queried.

See IBarCodeReaderControl::SetAttritbute

for a description of these structures.

dwAttrBufferSize [in] The maximum number of bytes that

rgbAttrBuffer can store.

Return Values

A standard status code that indicates success or failure.

Remarks

The following attributes are not supported on the imager:

S ITC_RDRATTR_TONE_ENABLE

S ITC_RDRATTR_VOLUME_LEVEL

S ITC_RDRATTR_TONE_FREQUENCY

S ITC_RDRATTR_GOOD_READ_BEEPS_NUMBER

S ITC_RDRATTR_GOOD_READ_BEEP_DURATION