In the early days of mwgfx some things were initially provided by extra dlls that were later incorporated into the main dll set
mwtwack is actually an interface to the windows Twain system which controls imaging devices such as scanners and cameras. It provides functions to select and operate twain devices and import images from them. The strange name is actually from windows which calls an object accessing Twain functions a Twacker.
The twain code was long ago incorporated in to mwgfx24.dll so mwtwack.dll is no longer needed.
