TwainGetThreshold Method (GdPictureImaging)

In This Topic

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.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Function TwainGetThreshold() As Integer

public int TwainGetThreshold()

public function TwainGetThreshold(): Integer;

public function TwainGetThreshold() : int;

public: int TwainGetThreshold();

public:
int TwainGetThreshold();

Return Value

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

Remarks

Before using this method check that the TWAIN state is >= 4 (TWAIN_SOURCE_OPEN) To get the TWAIN state, use the TwainGetState() method.

Reference

GdPictureImaging Class
GdPictureImaging Members
TwainGetState Method
TwainSetThreshold Method
TwainGetLastConditionCode Method
TwainGetLastResultCode Method