IMVBarcodeDecoderCallback Interface

The IMVBarcodeDecoderCallback interface contains callback methods that are called by the MV Barcode Decoder Filter to submit the decoded data to the controlling application.

 

Methods:
SetCode Set decoded code string.
SetCodeDimension Set code dimensions.
SetCodeRectangle Set code rectangle.
SetCodeSubType Set the subtype of the code.
SetCodeType Set the type of the code.
SetDecodingTime Set decoding time in milliseconds.
SetNumOfReedSolomons Set the number of Reed-Solomon errors.
SetPatternQuality Set the percentage of wrong pixels.
SetRejectionReason Set rejection reason.
SetResult Set result.

 

Header file: IMVBarcodeDecoder.h
Interface definition language file: IMVBarcodeDecoder.idl
Type Library: MVBarcodeDecoderStandard, MVBarcodeDecoderAdvanced
Interface ID: IID_IMVBarcodeDecoderCallback

 

Methods:

Method IMVBarcodeDecoderCallback::SetCode

Declaration: Sub SetCode(bstrCode As String)

Set code characters.

Parameter:
bstrCode The decoded data as string.

C Prototype:

HRESULT SetCode(STRING bstrCode);

 

Method IMVBarcodeDecoderCallback::SetCodeDimension

Declaration: Sub SetCodeDimension(iX As Long, iY As Long)

Set code dimensions. Only valid for 2D barcodes, Data Matrix or PDF 417.

Parameter:
iX Number of code columns.
iY Number of code rows.

C Prototype:

HRESULT SetCodeDimension(LONG iX, LONG iY);

 

Method IMVBarcodeDecoderCallback::SetCodeRectangle

Declaration: Sub SetCodeRectangle(iX1 As Long, iY1 As Long, iX2 As Long, iY2 As Long, iX3 As Long, iY3 As Long, iX4 As Long, iY4 As Long)

Set code rectangle.

Parameter:
iX1 X value for corner one.
iY1 Y value for corner one.
iX2 X value for corner two.
iY2 Y value for corner two.
iX3 X value for corner three.
iY3 Y value for corner three.
iX4 X value for corner four.
iY4 Y value for corner four.

C Prototype:

HRESULT SetCodeRectangle(LONG iX1, LONG iY1, LONG iX2, LONG iY2, LONG iX3, LONG iY3, LONG iX4, LONG iY4);

 

Method IMVBarcodeDecoderCallback::SetCodeSubType

Declaration: Sub SetCodeSubType(iSubType As Long)

Set the subtype of the code. Only valid for linear 1D Barcodes. See _MV_BARCODE_LINEAR_SUBTYPE for possible values.

Parameter:
iSubType Subtype of the decoded barcode.

C Prototype:

HRESULT SetCodeSubType(LONG iSubType);

 

Enumeration _MV_BARCODE_LINEAR_SUBTYPE
Member name Member value
MV_BARCODE_LINEAR_CODE_128 1
MV_BARCODE_LINEAR_CODE_39 2
MV_BARCODE_LINEAR_CODABAR 3
MV_BARCODE_LINEAR_INTERLEAVED_2_OF_5 4
MV_BARCODE_LINEAR_EAN_13_UPC 5
MV_BARCODE_LINEAR_EAN_8 6
MV_BARCODE_LINEAR_UPC_E 7

 

 

Method IMVBarcodeDecoderCallback::SetCodeType

Declaration: Sub SetCodeType(iType As Long)

Set the type of the code. See _MV_BARCODE_TYPE for possible values.

Parameter:
iType Type of the decoded barcode.

C Prototype:

HRESULT SetCodeType(LONG iType);

 

Enumeration _MV_BARCODE_TYPE
Member name Member value
MV_BARCODE_DATA_MATRIX 1
MV_BARCODE_LINEAR 2
MV_BARCODE_PDF_417 4

 

 

Method IMVBarcodeDecoderCallback::SetDecodingTime

Declaration: Sub SetDecodingTime(iTime As Long)

Set the time that was needed to decode the barcode in milliseconds.

Parameter:
iTime Decode time in milliseconds

C Prototype:

HRESULT SetDecodingTime(LONG iTime);

 

Method IMVBarcodeDecoderCallback::SetNumOfReedSolomons

Declaration: Sub SetNumOfReedSolomons(iNumOfReedSolomons As Long)

Set the number of Reed-Solomon errors in the decoded barcode.

Parameter:
iNumOfReedSolomons Number of Reed-Solomon errors

C Prototype:

HRESULT SetNumOfReedSolomons(LONG iNumOfReedSolomons);

 

Method IMVBarcodeDecoderCallback::SetPatternQuality

Declaration: Sub SetPatternQuality(iQuality As Long)

Set the percentage of wrong pixels. Only valid for Data matrix barcodes.

Parameter:
iQuality Percent of wrong pixels 0-100%

C Prototype:

HRESULT SetPatternQuality(LONG iQuality);

 

Method IMVBarcodeDecoderCallback::SetRejectionReason

Declaration: Sub SetRejectionReason(iRejectionReason As Long)

Set rejection reason. !!! Obsolete !!!

Parameter:
iRejectionReason -

C Prototype:

HRESULT SetRejectionReason(LONG iRejectionReason);

 

Method IMVBarcodeDecoderCallback::SetResult

Declaration: Sub SetResult(bResult As Boolean)

Set result. !!! Obsolete !!!

Parameter:
bResult TRUE if the code was decoded successfully.

C Prototype:

HRESULT SetResult(BOOLEAN bResult);