Hi Sergey,
I am not shure. But, I think to produce the deal in DOS mode is easier than WINDOWS.
I saw a long time ago on the WEB at Microsoft´s site (I think) an article with some samples with that.
It´s something like OPEN in a low level format using the name of file "COMx:" and then produce all the FREADs and FWRITEs.
Try search at the MSDN, maybe you will find it.
CLAUDIO
"Now to him who is able to do immeasurably more than all we ask or imagine, according to his power that is at work within us, Ephesians 3:20