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Using ShellExecute() to open file and pipe output to file

Posted on 2004-10-07
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Last Modified: 2013-11-17
If how can I pipe the output of a dos .exe file to another file.

If I start the program with C:\runme.exe paramerteer >> output.txt the output will not be shown on the screen but written to output.txt

If i use:
ShellExecute(NULL, "open", "c:\\runme.exe", "parameter >> output.txt", NULL, SW_SHOWNORMAL);
runme.exe start up but dont write output to output.txt.
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Question by:Bjo020
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Cayce earned 125 total points
ID: 12255049
Use PIPES :)

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/ipc/base/pipe_functions.asp

It's not hard to accomplish. But the learning curve is steep.

You'll need to use CreateProcess (which ShellExecute internally calls). http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/createprocess.asp

Just specify your own stdin, stdout and stderr (which should be pipes).

Now work with the pipes as standard files. (Remember to input anyting the app needs through stdin).

Check this example:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/creating_a_child_process_with_redirected_input_and_output.asp

Good luck!

PS. I just had to do this a few weeks ago. It was really fun.
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Author Comment

by:Bjo020
ID: 12265414
Just what i needed.
The examples worked on first try and now only needs to be customized.

thx.
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