'Declaration
Public Function TwainGetBrightness() As Integer
public int TwainGetBrightness()
public function TwainGetBrightness(): Integer;
public function TwainGetBrightness() : int;
public: int TwainGetBrightness();
public: int TwainGetBrightness();
Return Value
If success: The TWAIN standard *says* that the range for this cap is -1000 ... +1000. If fail,
Returns -99999 -> Use TwainGetLastResultCode() and TwainGetLastConditionCode() methods for
diagnosing the error.