How to run python script with arguments using ShellExecuteW?

Question

I am trying to run python script with arguments using WinAPI function ShellExecuteW.

It looks like a

python .\PythonDLL_Example.py 125960 126110 126070 126250 3928 274353.845945816 119761.8349277858 18080.59072693367 -252416.3714632094 -79682.09253258759 -12446.11663140202

I tried to do like this using full paths, just in case:

ShellExecuteW(NULL, NULL, "C:\\Users\\Amber\\AppData\\Local\\Programs\\Python\\Python37\\python.exe", "C:\\Users\\Amber\\AppData\\Roaming\\MetaQuotes\\Terminal\\DEA332DEFF5165CB2EAFB6F9BD062C50\\MQL5\\Experts\\Advisors\\PythonDLL_Example.py 125960 126110 126070 126250 3928 274353.845945816 119761.8349277858 18080.59072693367 -252416.3714632094 -79682.09253258759 -12446.11663140202", NULL, 10);

No result Error %d42

Test execution like below run successfully:

ShellExecuteW(NULL, "open", "C:\\Windows\\Notepad.exe", NULL, NULL, 10);

Please, ho to execute my script?

Thank you

Why are you using ShellExecute() for this. Since you are trying to invoke python.exe directly, you should be using CreateProcess() instead — Remy Lebeau
– Remy Lebeau, Commented Jul 18, 2019 at 22:32
Remy is correct. Use CreateProcess for this. Even then, you'll need to supply the working directory, just as you need to whe calling ShellExecute, although your code does not. — David Heffernan
– David Heffernan, Commented Jul 18, 2019 at 22:52

Kirill Rudnev · Accepted Answer · 2019-07-25 09:48:29Z

0

How I solved my case:

I associated .py files with python.exe in my OS Windows. So, I do not use "python .\PythonDLL_Example.py ....." I use ".\PythonDLL_Example.py ....." instead.
I sorted out, that "%d42" is not an error. This is HINSTANCE of process. I found a mistake of my script (no transmitted arguments to script).

for me, correct is:

ShellExecuteW(NULL, NULL, "C:\\Users\\Amber\\AppData\\Roaming\\MetaQuotes\\Terminal\\DEA332DEFF5165CB2EAFB6F9BD062C50\\MQL5\\Experts\\Advisors\\PythonDLL_Example.py", "125960 126110 126070 126250 3928 274353.845945816 119761.8349277858 18080.59072693367 -252416.3714632094 -79682.09253258759 -12446.11663140202", NULL, SW_HIDE);

answered Jul 25, 2019 at 9:48

Kirill Rudnev

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