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TSR in C

Posted on 2002-04-09
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Last Modified: 2010-04-15
Hi all,

I'm looking to create a TSR program in C but I'm not 100% sure how to do this.  I'm just looking for information, website, or if someone so cares, an easy / simple example.

Thanks,
Corey
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Question by:Corey080698
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Expert Comment

by:cookre
ID: 6932673
Plenty of examples here:
http://www.simtel.net/pub/msdos/tsrutil/

Be warned, TSRs apply to pure DOS only.
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by:Corey080698
ID: 6932690
Oh...okay.  I'm actually looking to do this in a Windows environment...how would I do this in Windows?  In linux I could always fork...but in windows, I am lost...
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Accepted Solution

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cookre earned 50 total points
ID: 6932728
The idea behind a TSR was to start it up, have it make a portion of itself resident, and then exit, giving you the command prompt back so you could run another program while the resident portion of the TSR was still active.

In that sense, every Window's program is a TSR.

Now, if the idea is to create a child process to run in the same address space as the caller, you'd use CreateThread().

To create an independant activity, use CreateProcess().

There is no exact equivalent to fork(), i.e., something to clone the parent.

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Author Comment

by:Corey080698
ID: 6933745
Thanks Cookre....that's excatly what I needed to know!!
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