static extern int StrFromTimeInterval([MarshalAs(UnmanagedType.LPWStr)] StringBuilder buffer, uint bufferSize, uint milliSeconds, int digits);

Declare Function StrFromTimeInterval Lib "Shlwapi.dll" (TODO) As TODO

    NativeMethods.StrFromTimeInterval(sb, (uint) sb.Capacity, (uint) timeSpan.TotalMilliseconds, digits);