Help Version 19.0.2017.10.27
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L_INT pEXT_CALLBACK YourFunction(ulType, rcBarLocation, pszBarCodeData, pUserData)
L_UINT32 ulType; |
type of the decoded barcode |
RECT rcBarLocation; |
location of the decoded barcode |
L_CHAR * pszBarCodeData; |
string of the decoded barcode |
L_VOID * pUserData; |
pointer to additional parameters |
Occurs when the reading process has successfully decoded a barcode symbology
Parameter |
Description |
| ulType | Barcode type. |
| rcBarLocation | The barcode location on the bitmap. |
| pszBarCodeData | Pointer to the barcode data string. |
| pUserData | Void pointer that you can use to pass one or more additional parameters that the help callback function needs.
To use this feature, assign a value to a variable or create a structure that contains as many fields as you need. Then, in this parameter, pass the address of the variable or structure, casting it to L_VOID *. The callback function, which receives the address in its own pUserData parameter, can cast it to a pointer of the appropriate data type to access your variable or structure. If the additional parameters are not needed, you can pass NULL in this parameter. |
| SUCCESS | Continue the process. |
| ERROR_USER_ABORT | Abort the process. |
Use this callback function to get the decoded barcode before finishing the processing of the entire input document.