Function winapi::um::cfgmgr32::CM_Open_Class_Key_ExA

pub unsafe extern "system" fn CM_Open_Class_Key_ExA(
    ClassGuid: LPGUID, 
    pszClassName: LPCSTR, 
    samDesired: REGSAM, 
    Disposition: REGDISPOSITION, 
    phkClass: PHKEY, 
    ulFlags: ULONG, 
    hMachine: HMACHINE
) -> CONFIGRET