Packets

David Hognkamp · Jan 9, 2004

I am trying to write a vb.net app that talks to a device
over the network. This device has a specific structure
for the packet. The C code is:
struct Packet
{
WORD wToken1;
WORD wToken2;
UINT uID;
WORD WaveformSel;
BYTE bSize;
BYTE bReserved[5];
union dataHeader
{
BYTE data[32];
unsigned short int
shortIntVal[16];
unsigned long int longIntVal[8];
float
floatVal[8];
} headerData;

I have tried to do a structure but can't seem to figure
it out and our C programer doesn't do VB. Any help would
be apreciated.

Jay B. Harlow [MVP - Outlook] · Jan 10, 2004

David,
By "packet" do you mean a TCP/IP packet?

If this is TCP/IP based I would recommend custom
serialization/deserialization routines based on the BinaryReader &
BinaryWriter classes in the System.IO namespace.

The following article gives a C# example of how do this.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dncscol/html/csharp09182003.asp

The example should be easily converted to VB.NET, post if you need help.

Hope this helps
Jay

Packets

David Hognkamp

Jay B. Harlow [MVP - Outlook]