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Set the Asynchronous Mode or Blocking Mode for OCR2SearchableMultipagePDF and OCRStartScan method.By default is Asynchronous Mode. With Asynchronous Mode, when you call OCRStartScan , the recognition process completed, it will fire OCRRecognized event.
When you call OCR2SearchableMultipagePDF , the recognition processing, it will fire OCRPDFA event.
Public Function OCRScanTextAsync ( _
ByVal bAsync As Bool
)
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Parameter
bAsync
true - Asynchronous Mode, false - Blocking Mode
No Return Value
Example
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Visual Basic Syntax
ImageViewer1.OCRRecognizeMode=0
ImageViewer1.OCRScanTextAsync true
ImageViewer1.OCRStartScan(0, "dictfiles")
'after OCRRecognized event fired
bresult= ImageViewer1.OCRSaveRecognizedText("c:\text.txt")
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