Hi. We've designed our application to dynamically create and call forms using a Different Application domain. We've almost got it working apart from when i want to run a sub that we created ourself. The reason we are doing this is for the application to first look in the G:\prod\Comp\DLLs folder and if it can't find the DLLs there it will look in eM1\Core\DLLs.

   Dim objDomain As AppDomain

   Dim objEvidence As Security.Policy.Evidence
   Dim strApplicationPath As String

   'Create a new domain and run the programs from there
    objEvidence = AppDomain.CurrentDomain.Evidence
    objDomain = AppDomain.CreateDomain("NewDomain", objEvidence, "G:\", "", False)

    objDomain.AppendPrivatePath("prod\Comp\DLLs")
    objDomain.AppendPrivatePath("eM1\Core\DLLs")

    Dim frmLogin = objDomain.CreateInstanceAndUnwrap("M1Main", "M1Main.frmLogin")

    ' Hide the system picker and show the login form
    Me.Hide()
    frmLogin.setdata(Me)

    CType(frmLogin, Form).Show()

It all works apart from the Line highlighted in red.

If you have any ideas please reply.

Thanks

Matt

sorry i should have mentioned that the error message i get is:

System.MissingMemberException: Public member 'setdata' on type 'MarshalByRefObject' not found.
   at Microsoft.VisualBasic.CompilerServices.LateBinding .InternalLateCall(Object o, Type objType, String name, Object[] args, String[] paramnames, Boolean[] CopyBack, Boolean IgnoreReturn)
   at Microsoft.VisualBasic.CompilerServices.LateBinding .LateCall(Object o, Type objType, String name, Object[] args, String[] paramnames, Boolean[] CopyBack)
   at SystemPicker.frmMain.ClickedConnectButton(Object sender, EventArgs e) in G:\M1.net\Development\Sourcecode\GlobalM1\SystemPi cker\frmMain.vb:line 225