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Elemental
USA
56 Posts |
 Posted - Nov 22 2019 : 11:46:31
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I have made posts before about storing TWAIN settings to a local file, but I feel as if I'm doing more work than I'm supposed to. All I want is for my application to remember which TWAIN device was last picked by the user and what their custom settings were.
For example, when I use Twack_32 (by the TWAIN working group), it remembers my last selected scanner and scan settings, without any apparent change to the registry or modifying any local files. How does it do that? I want my application to do that, too. |
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xequte
38186 Posts |
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Elemental
USA
56 Posts |
Posted - Nov 25 2019 : 11:58:36
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It seems that Twack_32.exe does more than that. Allow me to elaborate.
The TWAIN driver for my HP 5590 saves settings in presets. These presets are listed in the first tab of the TWAIN dialog. Whenever I use ImageEn to set the TWAIN properties of the scanner, based on settings I saved in a custom text file, the HP driver goes and creates a new preset. If I run my application 20 times, I end up with 20 new presets.
Twack_32, however, doesn't do that. It not only remember which TWAIN device I last selected in that program, but also which preset. It doesn't create new ones or modify old ones. I want my application to do that, too. And I have to believe that Twack_32 was not written just with HP TWAIN drivers in mind. How can I use ImageEn to replicate that functionality? |
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Elemental
USA
56 Posts |
Posted - Nov 25 2019 : 14:12:33
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| I downloaded the Demos which have been good to see. I had forgotten about those as good resources. Now that I know how to GET the default TWAIN device, how do I make my software SET the default device? |
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xequte
38186 Posts |
Posted - Nov 26 2019 : 16:34:08
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Hi
The process for that is not part of the Twain standard, so not a method available in ImageEn. There may be a general method to set it in Windows with other Delphi code.
Nigel
Xequte Software
www.imageen.com
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Remembering TWAIN Settings
