GdPictureImaging.TwainSetGamma Method

Tries to set the current gamma correction value for the selected twain source.

public Boolean TwainSetGamma(
    Double Gamma
);

Visual Basic

Public Function TwainSetGamma(
    ByVal Gamma As Double
) As Boolean

Parameters

Parameters	Description
Gamma	Gamma correction value for the image data. Default value is 2.2

Returns

TRUE if success, FALSE otherwise -> Use TwainGetLastResultCode() and TwainGetLastConditionCode() functions for diagnosing the error.

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

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