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Canon Scanner ScanGear, Scan button not respond, but preview button is working

Forums › TWAIN Classic › Canon Scanner ScanGear, Scan button not respond, but preview button is working

  • This topic has 1 reply, 1 voice, and was last updated 1 year, 1 month ago by Michael Wang.
Viewing 2 posts - 1 through 2 (of 2 total)
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  • February 5, 2020 at 12:40 pm #52306 Reply
    Michael Wang
    • Topics - 98
    • Replies - 191
    • Total Posts - 289

    Hi :

    Very strange issue, when I invoke the Canon ScanGear using .Net program

    ScanGear “Scan” button does not working.
    The preview Button is still work.

    Also this function return immediately which should not if GUI set to Module UI
    p_oGUI = New Twain.TwUserInterface()
    With p_oGUI
    .ShowUI = p_siShowTwainUI
    .ModalUI = 1
    .ParentHand = p_ptrParentApp
    End With
    Twain.Win32.DSuserif(p_oApp, p_oDataSource, Twain.TwDG.Control, Twain.TwDAT.UserInterface, Twain.TwMSG.EnableDS, p_oGUI)

    anyone have some idea of this behavior ?

    Thanks.

    February 5, 2020 at 12:42 pm #52307 Reply
    Michael Wang
    • Topics - 98
    • Replies - 191
    • Total Posts - 289

    This is related to Canon ScanGear only, other type/brand of Scanner works fine with this code.
    https://www.codeproject.com/Articles/991207/TWAINComm-A-Csharp-TWAIN-Communications-Library

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Reply To: Canon Scanner ScanGear, Scan button not respond, but preview button is working
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