The proxy has a full gui. You just need to decide what packet you want to send and add a button to it.
<edit>
If you wanted to do something like CoOperative had... Just do something like
Code:
private void btnSend_Click(object sender, EventArgs e)
{
string[] bytes = packetSend.Text.Split(' ');
byte[] toSend = new byte[bytes.Length + 8];
for (int I = 0; I < bytes.Length; I++)
toSend[I] = byte.Parse(bytes[I]);
selectedChar.SendToServer(toSend);
}
Where btnSend is a button to send and packetSend is a textbox where you enter the bytes.