Function winapi::um::shellapi::SHGetDiskFreeSpaceExA

pub unsafe extern "system" fn SHGetDiskFreeSpaceExA(
    pszDirectoryName: LPCSTR, 
    pulFreeBytesAvailableToCaller: *mut ULARGE_INTEGER, 
    pulTotalNumberOfBytes: *mut ULARGE_INTEGER, 
    pulTotalNumberOfFreeBytes: *mut ULARGE_INTEGER
) -> BOOL