Hello -all-,

an IOCtl call into a driver has to return a variable-length list.  To skip to 
return a header in front of this list (as I have done on previous 
opportunities) I want to update the application's idea of needed/filled data 
buffer length.

From the application's view:

DosDevIOCtl(hd,cat,func,parm,10,&parmlen,data,1000,&datalen)

Driver fills buffer at 'data' and has to update 'datalen' via that 9. 
argument.  Odd but... the Physical Device Driver Reference doesn't say how to 
do it and all the samples ignore this possibility.

My driver is marked as level 2 and I found the '1000' in the request packet.

Someone?
    Vitus

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