Threshold and PaperSize not work.

[ikary]

Hi,
I tried to set threshold and paper size with method "TwainSetCurrentThreshold(0~255)" and "TwainSetPaperSize(A4~B4)" after calling "TwainOpenDefaultSource()", but both of them are not changed.
Is there any other method should I call to make them work?

[ikary]

After I update the scanner driver, TwainSetCurrentThreshold() does work now.
I tried to call TwainGetAvailablePaperSize and it return 16, but I got false returned by calling TwainSetPaperSize().

[Loïc]

Hi,

Check you are using supported paper size by your TWAIN device:

Code: Select all

For nCpt = 1 To Imaging1.TwainGetAvailablePaperSizeCount
    MsgBox "Supported :" + Str(Imaging1.TwainGetAvailablePaperSizeNo(nCpt))
Next nCpt

For the threshold, this feature can be not supported by your device.
Check the returned value of the TwainSetCurrentThreshold() method. If the return is False this mean that the Threshold capability is not supported.

Best regards,

Loïc