TwainGetAvailableContrastCount Method (GdPictureImaging)

In This Topic

Returns the number of available contrast values which can be used by the opened source in its current configuration.

Syntax

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

'Declaration
 
Public Function TwainGetAvailableContrastCount() As Integer

public int TwainGetAvailableContrastCount()

public function TwainGetAvailableContrastCount(): Integer;

public function TwainGetAvailableContrastCount() : int;

public: int TwainGetAvailableContrastCount();

public:
int TwainGetAvailableContrastCount();

Return Value

If Success, non zero: The number of available contrast values. Else 0 if fail -> 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
TwainGetAvailableContrastNo Method
TwainGetLastConditionCode Method
TwainGetLastResultCode Method