[fpc-pascal] TProcess vs RunProcess()

Graeme Geldenhuys mailinglists at geldenhuys.co.uk
Fri Jan 27 18:24:38 CET 2017

On 2017-01-26 14:28, Michael Van Canneyt wrote:
> TProcess gives you full access to the process. You can kill it,
> pause it, write to stdin, read from stdout.
> These things cannot be done with RunProcess. 
> That's one-shot and wait till it exits.

Another difference.... simply so others might learn from this discussion
(like I did).

If you have a huge list of parameters, RunProcess() - at least under
Windows - will most likely hit a 260 character limit, and then fail to
actually execute. I don't actually know where that 260 limit originates
from (Windows API, Command Prompt, FPC etc).

Whereas if you use TProcess and the Parameters (TStrings) property, you
don't have such a limitation.

This was what I experienced.


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