CPU usage in percentage (without elevation)

Hi i am professional C# developer, i can do coding in c++ also . i can do it but my query is you want it in c++ only or you are ok with C# as i allreay have code for this in c# , which was done in previous security application

I posses good knowledge about Windows' internal working and can complete the required task. I can make it as a GUI application or just a toast that would show up the CPU Usage.

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Hello! I can do it in 4 days easy and good. If necessary, I can explain the code used features. Have experience.