GdPictureImaging.TwainGetAvailableContrastNo Method

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

public Double TwainGetAvailableContrastNo(
    int Number
);

Visual Basic

Public Function TwainGetAvailableContrastNo(
    ByVal Number As Integer
) As Double

Parameters

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

Returns

The selected contrast value.

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

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