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#1 Posted : Sunday, November 12, 2006 9:47:15 PM(UTC)
congruentdesign

Groups: Registered
Posts: 4


I am using Leadtools v13.  I switched from the DLL to the Classlib.  In the following code IsAvailable() keeps returning FALSE.  The problem did not occur with L_IsTwainAvailable(m_hWnd).

LUserBitmapWindow    m_Bitmap;

void CMyView::OnUpdateTwainSelsource(CCmdUI* pCmdUI)
{
    pCmdUI->Enable(m_Bitmap.Twain()->IsAvailable()); 
}

The scanner is a UMAX S-12 SCSI and uses UMAX's Vistascan32 driver.  Other 3rd party software (e.g., Paperport v8) is able to access the scanner.  I checked and the driver (.ds) is in \windows\twain_32.

Any suggestions would be appreciated.

Also, I tried the program on another machine with a new MicroTek USB Twain scanner.  Same problem.  3rd party software is OK, but the leadtools will not recognize it.
 

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#2 Posted : Monday, November 13, 2006 7:26:32 AM(UTC)

Amin  
Amin

Groups: Manager, Tech Support
Posts: 356


Here's a code sample that checks for Twain availability using LEAD C++ Class Library. Please check your code to see if anything is different. The code works for both versions 13 and 14.

LBitmapBase m_Bitmap;

nRet = LBase::LoadLibraries(LT_TWN);
m_Bitmap.Twain()->SetWindow(hWnd); //hWnd must be a valid window handle
if(m_Bitmap.Twain()->IsAvailable())
   ::MessageBox(hWnd, "OK", "Twain Test", MB_OK);
else
   ::MessageBox(hWnd, "Not OK", "Twain Test", MB_OK);

Amin Dodin

Senior Support Engineer
LEAD Technologies, Inc.
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