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From: valley@gsbsun.uchicago.edu (Doug Dougherty)
Newsgroups: comp.os.msdos.programmer
Subject: Re: File truncation in MSDOS?
Message-ID: <1991May21.193921.22725@midway.uchicago.edu>
Date: 21 May 91 19:39:21 GMT
References: <1991May21.142518.5467@hq.demos.su>
Sender: news@midway.uchicago.edu (NewsMistress)
Organization: University of Chicago
Lines: 27

sir@hq.demos.su (Sergey Ryzhkov) writes:

>How I can truncate the tail of the file i.e. delete the part of
>the file from the current position to the eof. Are there any
>system service in DOS to do this?

lseek to the spot, then write 0 bytes.  Works every time...

>How I can to insert the keyboard key combination Ctrl+Shist?
>I have no problem with such combinations as Ctrl+PgUp or Shift+Ins.
>But Ctrl+Ins do not generate any input from function getbios () or
>any other. What can I do?

You can't.  Assuming that what you want to do is pop up a TSR via
programmatic control, you have to wire yourself into the TSR's INT 9
handler, and trick it into thinking the key combination was struck (even
though it wasn't).  I have done this with several TSR's, but there is 
no general way to do it (i.e., no way which involes just pushing the key
combination)

>			Sergey Ryzhkow, Moscow, Russia, USSR

An obvious fake.  The USSR no longer exists.  (I know they changed their
name recently; don't know off hand what the new name is...)
--

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