How to use audioendpoints and mmdevapid in qt?

[mmjvox]

I found a function for set windows master volume :
https://www.codeproject.com/Tips/233484/Change-Master-Volume-in-Visual-Cplusplus

I defined INCLUDEPATH and DEPENDPATH in my .pro

but can't compile

[mrjj]

Hi
I think you also need to link Ole32.dll

[mmjvox]

@mrjj

thanks the problem solved!
Also one of my friends said add these lines like #include

#pragma comment(lib, "strmiids")
#pragma comment(lib, "ole32")
#pragma comment(lib, "oleaut32")

and it worked!