GdPictureImaging.TwainGetThreshold Method

Returns 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 int TwainGetThreshold();

Visual Basic

Public Function TwainGetThreshold() As Integer

Returns

Current threshold value between 0 and 255. -1 If it is not supported by the current device (Use TwainGetLastResultCode() and TwainGetLastConditionCode() functions for diagnosing the error.)

Remarks

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

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