Function PdhOpenLogA 

pub unsafe extern "system" fn PdhOpenLogA(
    szlogfilename: PCSTR,
    dwaccessflags: PDH_LOG,
    lpdwlogtype: *mut PDH_LOG_TYPE,
    hquery: PDH_HQUERY,
    dwmaxsize: u32,
    szusercaption: PCSTR,
    phlog: *mut PDH_HLOG,
) -> u32