GdPictureImaging.TwainSetContrast Method

Tries to set the current contrast for the next acquisition.

public Boolean TwainSetContrast(
    int Contrast
);

Visual Basic

Public Function TwainSetContrast(
    ByVal Contrast As Integer
) As Boolean

Parameters

Parameters	Description
Contrast	The TWAIN standard says that the range for this cap is -1000 ... +1000.

Returns

True if success, else False -> Use TwainGetLastResultCode() and TwainGetLastConditionCode() functions for diagnosing the error.

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

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