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 TwainParams.SourceCount 64bit		  New Topic  Reply to Topic
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aleatprog

122 Posts
Posted - Jul 22 2019 :  02:38:19  Show Profile  Reply
In the TwainDemo, available scanning devices are listed using TwainParams.SourceCount:

for i := 0 to ImageEnView1.IO.TwainParams.SourceCount - 1 do
ComboBox1.Items.Add( String( ImageEnView1.IO.TwainParams.SourceName[i] ));

Compiled in 32bit the demo works fine, in 64bit the list is empty because the above mentioned code had been ignored. May you reproduce it?

Is this caused by some property of the driver or is TwainParams.SourceCount working only in 32bit?

Al

xequte

38180 Posts
Posted - Jul 22 2019 :  22:05:36  Show Profile  Reply
Hi Al

What makes you say the code is "ignored". The Twain code is compiled in both 32 and 64bit modes.

More likely you are seeing an absence of Twain drivers. Many manufactures do not bother including 64bit Twain drivers.

Nigel
Xequte Software
www.imageen.com
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aleatprog

122 Posts
Posted - Jul 23 2019 :  13:29:54  Show Profile  Reply
Hi Nigel,

I chose the term "ignored" as in debug mode the above code is skipped/jumped/not processed while pressing F8. And, yes, as I wrote, probably it's due to some driver property. Did the TwainDemo worked well on your side in 64bit?

Meanwhile, I connected the same scanner using WIA which works perfect in 64bit.

Al
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xequte

38180 Posts
Posted - Jul 25 2019 :  04:33:48  Show Profile  Reply
Hi Al

Yes, it works correctly on our test system.



Nigel
Xequte Software
www.imageen.com
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