Function NetSend

Hello,
I would like send a message from project 1 to the main project, but I have an exception.
The workspace settings:
-Main project
-sub project 1
-sub project 2
The function in project 1:

public void MacroNetSend()
        {
            try
            {
                object oItem = new object();
                oItem = "Hello World!!!";
                this.NetSend(zenOn.tpNetSendType.tpToAllClients, "", 0, ref oItem);
            }
            catch (Exception ex)
            {
                MessageBox.Show("MacroNetSend - " + ex.Message);
            }
        }

ex.Message= Invalid type variable( exception from HRESULT: 0x80020008(DISP_BADVARTYPE))
What must I change?"
Thanks,
Daan van Genderen

This is a migrated post! Originally posted on 03.12.2010 by user dvangenderen. Please be aware that information can be outdated.