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#1 Posted : Tuesday, March 21, 2006 1:04:46 PM(UTC)

bjames  
bjames

Groups: Registered
Posts: 22


Hello all,
 
I've downloaded the LEADTools 14.5 eval and I'm trying to learn the API's.
 
I have some code as follows..
 
(VB6, COM)
 
Private WithEvents m_LEADTWAIN As LEADRasterTwain_D
 
m_LEADTWAIN.EnableTwainEvent = True
nRet = m_LEADTWAIN.Acquire(L_LTWAIN_SHOW_USER_INTERFACE)
 
and when i scan the following event fires
 
Private Sub m_LEADTWAIN_AcquirePageEvent(ByVal pBitmap As Long)
   '---------------------------------------------------
   '  we are saving a singlage page
   '---------------------------------------------------
  
   LEAD1.Bitmap = pBitmap
   LEAD1.ForceRepaint
  
End Sub
 
This is perfect, it allows my pages to be displayed in the LEAD control as they are scanned.
 
Since the AcquireMultiEvent doesn't have a pBitmap parameter, what's the best way for me to assign the captured bitmap to a LEAD control for display?
 
Thanks in advance to all answers.
 
Bryan James.
 

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#2 Posted : Thursday, March 23, 2006 9:10:31 AM(UTC)

Amin  
Amin

Groups: Manager, Tech Support
Posts: 355


Bryan,

The point of using AcquireMulti method is to get batches of scanned
pages to disk as quickly as possible using our Fast Twain technique. In
some cases, the optimization actually determines that the fastest
configuration is to use disk transfer, which makes the scanner's driver save the files directly without going through a LEAD bitmap object.

In short, you can't display the bitmap directly in the event, unless
you load it from disk in the event, which is bound to slow the process
down. In this case, it might be better to use Acquire (which is also capable of multi-page scanning) instead of AcquireMulti.

Amin Dodin

Senior Support Engineer
LEAD Technologies, Inc.
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