Available in LEADTOOLS Imaging Pro, Vector, Document, and Medical Imaging toolkits.
TWAIN Functionality: Callbacks
LTwain::AcquireCallBack
LTwain::BitmapCallBack
LTwain::CapabilityCallBack
LTwain::FindFastConfigCallBack
LTwain::SaveCapCallBack
LTwain::SaveErrorCallBack
LTwain::SetPropertyCallBack
LTwain::SourceInfoCallBack