public static extern PmError Pm_Write(IntPtr stream, PmEvent[] buffer, int length);
 public static PmError Pm_Write(IntPtr stream, PmEvent[] buffer, int length)
 {
     return Is64Bit
         ? PortMidiMethods64.Pm_Write(stream, buffer, length)
         : PortMidiMethods32.Pm_Write(stream, buffer, length);
 }