GdPictureImaging.TwainSetThreshold Method

Try to specify the dividing line between black and white. This is the value the Source will use to threshold, if needed, when scanning B&W image.

public Boolean TwainSetThreshold(
    int Threshold
);

Visual Basic

Public Function TwainSetThreshold(
    ByVal Threshold As Integer
) As Boolean

Parameters

Parameters	Description
Threshold	Threshold value between 0 and 255.

Returns

True if success, else False -> Use TwainGetLastResultCode() and TwainGetLastConditionCode() functions for diagnosing the error.

Before using this function check that the TWAIN state is >= 4 (TWAIN_SOURCE_OPEN)

To get the TWAIN state, use the TwainGetState() function.