Doing logical OR comparisons with findstr.exe

Give this a shot, should work for you.

findstr /i "\.cpp \.h" myfile.txt

Wrap both within quotes and separate with a space. Note, you also have to escape the . in both of them.

If you need to include phrases (Space separated words) you can do it:

findstr /i /c:"IBSS" /c:"WDI Version" /c:"Soft Ap"

Or if you are getting some unwanted rows, you can exclude them using the /v parameter too:

findstr /i /c:Hosted /c:Version /c:Driver | findstr /v /i /c:drivers /c:native

(Tested this on Windows 7 and Windows 10)

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