TwainGetAvailableContrastNo Method (GdPictureImaging)

In This Topic

Returns an available contrast value which can be used by the opened source in its current configuration.

Syntax

'Declaration

 

Public Function TwainGetAvailableContrastNo( _

   ByVal Number As Integer _

) As Double

public double TwainGetAvailableContrastNo( 

   int Number

)

public function TwainGetAvailableContrastNo( 

    Number: Integer

): Double;

public function TwainGetAvailableContrastNo( 

   Number : int

) : double;

public: double TwainGetAvailableContrastNo( 

   int Number

)

public:

double TwainGetAvailableContrastNo( 

   int Number

)

Number: Index of the available contrast value. Must be a value between 1 and TwainGetAvailableContrastCount() returned value.

The selected contrast value.

Remarks

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