ushort2BytesLow;
ushort2BytesHigh;

  If HiByte And &H80 Then
    2BytesLow = ((HiByte1 * 0x100&) + LoByte1) Or 0xFFFF0000
  Else
    2BytesLow = (HiByte1 * 0x100) + LoByte1
  End If
  If HiByte And &H80 Then
    2BytesHigh = ((HiByte2 * 0x100&) + LoByte2) Or 0xFFFF0000
  Else
    2BytesHigh = (HiByte2 * 0x100) + LoByte2
  End If

uint32 4bytes = (2BytesHigh * 0x10000) + (2BytesLow And 0xFFFF)