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This event occurs when there is an error, such as a scanning error.
The data buffer for this event is as follows.
Syntax
// Error occurred data should fill the ReadFile buffer in this order:
// PosBarcodeScannerErrorOccurredEventData structure (length = sizeof(PosBarcodeScannerErrorOccurredEventData))
// Error Message (length = MessageLength)
// Scan Data (length = ScanDataLength)
// Scan Data Label (length = ScanDataLabelLength)
typedef struct _PosBarcodeScannerErrorOccurredEventData
{
PosEventDataHeader Header;
LONG IsRetriable;
UnifiedPosErrorSeverity Severity;
UINT32 VendorErrorCode;
UnifiedPosErrorReason Reason;
UINT32 ExtendedReason;
UINT32 MessageLength;
PosBarcodeScannerDataReceivedEventData PartialData;
} PosBarcodeScannerErrorOccurredEventData;
The following table shows the memory layout of the data buffer for this event.
| Memory value | Description |
|---|---|
0x00000006 |
EventType = PosEventType:: BarcodeScannerTriggerPressed |
UINT32 |
DataLength = sizeof(PosBarcodeScannerErrorOccurredData) + MessageLength + ScanDataLength + ScanDataLabelLength) |
BOOL |
IsRetriable |
32-bit UnifiedPosErrorSeverity |
Severity |
UINT32 |
VendorErrorCode |
32-bit UnifiedPosErrorReason |
Reason |
UINT32 |
ExtendedReason |
UINT32 |
MessageLength |
PosBarcodeScannerDataReceivedEventData |
PartialData |
UINT32 |
EventType not specified |
UINT32 |
DataLength = sizeof(PosBarcodeScannerDataRecievedEventData) + MessageLength + ScanDataLength + ScanDataLabelLength) |
UINT32 |
DataType not specified |
UINT32 |
ScanDataLength |
UINT32 |
ScanDataLabelLength |
byte [] |
MessageLength bytes of message |
byte [] |
ScanDataLength bytes of label data |
byte [] |
ScanDataLabelLength bytes of scan data |
Remarks
If a scanning error occurs, and some scan data was obtained, the event data contains the partial scan data.
Requirements
Header: pointofservicedriverinterface.h