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CAP_DEVICEONLINE capability , I always get TRUE

Forums › TWAIN Classic › CAP_DEVICEONLINE capability , I always get TRUE

  • This topic has 7 replies, 5 voices, and was last updated 13 years ago by gabe.
Viewing 8 posts - 1 through 8 (of 8 total)
  • Author
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  • May 3, 2006 at 5:05 pm #21934 Reply
    Anonymous
    Participant
    • Topics - 60
    • Replies - 107
    • Total Posts - 167

    Hi, all
    I try to check scanner device before scanning
    But when I get CAP_DEVICEONLINE capability , I always get TRUE result !
    Can any body help me?

    December 20, 2007 at 3:00 pm #23352 Reply
    black_ghost
    Participant
    • Topics - 1
    • Replies - 14
    • Total Posts - 15

    I have got the same problem. Can someone help me?

    December 20, 2007 at 4:55 pm #23353 Reply
    dpenney
    Participant
    • Topics - 3
    • Replies - 66
    • Total Posts - 69

    @volodymyr wrote:

    …when I get CAP_DEVICEONLINE capability , I always get TRUE result…

    It sounds like the DS you’re using does not implement CAP_DEVICEONLINE according to the specification. Some DS’s do but some don’t. I remember one that showed an error message on MSG_OPENDS if the device was not there.

    You will not be able to detect when the scanner is present if the developer of the DS you are using is unwilling to fix the problem.

    December 21, 2007 at 10:53 am #23354 Reply
    gabe
    Participant
    • Topics - 9
    • Replies - 583
    • Total Posts - 592

    deviceonline makes me sad. so very few drivers seem to support it, most seem to fail the check before openDs and then a dialogbox error when the device isn’t on.
    it’s forced me to implement a messagebox eater to watch for dialogboxes and close them, such a waste.

    .

    December 28, 2007 at 5:26 pm #23355 Reply
    Erin Dempsey
    Participant
    • Topics - 6
    • Replies - 26
    • Total Posts - 32

    Sorry, I deleted the user volodymyr by mistake. Please let me know if your ip address was also banned.

    December 28, 2007 at 5:47 pm #23356 Reply
    gabe
    Participant
    • Topics - 9
    • Replies - 583
    • Total Posts - 592

    @Hilary Minugh wrote:

    Sorry, I deleted the user volodymyr by mistake. Please let me know if your ip address was also banned.

    hehe, thats what you get – what with all the asking about portions of the spec that are under supported by a majority of the vendors and all.
    but this beggs the question (and pls don’t delete my account or ban my ip for asking) – how are they supposed to tell you if their ip is banned (without connecting from a different ip that is)?

    no no no.

    December 28, 2007 at 5:58 pm #23357 Reply
    Erin Dempsey
    Participant
    • Topics - 6
    • Replies - 26
    • Total Posts - 32

    Just hoping that he has another computer! Sometimes I get a bit carried away with deleting users with the amount of -*pam this forum receives. Watch out, you might be next……… 😉

    December 28, 2007 at 10:01 pm #23358 Reply
    gabe
    Participant
    • Topics - 9
    • Replies - 583
    • Total Posts - 592

    so the guy asks a question about being online and his account get deleted and his ip banned? irony anyone? anyone? Bueler?

    .

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Viewing 8 posts - 1 through 8 (of 8 total)
Reply To: CAP_DEVICEONLINE capability , I always get TRUE
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