Hey..

I have, (slightly simplified example) the following: one module mdlStartup and one form frmMain.

mdlStartup contains a public UDT like this:

Public Type DIAGRAM
   title       AS String
End Type

There are more fields but this will suffice for the example.

frmMain works fine with its own Private DS as DIAGRAM instance, but I now want to move all of frmMain's functions into modules and keep only form-specific code in frmMain.

So, to make sure I'd be able to, I made the following test routines in frmMain:

Public Sub test1()
    Dim dsTest As DIAGRAM
    dsTest.title = "TestABC"
    test2 dsTest
End Sub

Public Sub test2(dsInput As DIAGRAM)
    MsgBox dsInput.title
End Sub

Then in mdlStartup I called frmMain.test1() straight after frmMain.show.
Going into debug mode, I expected "TestABC" to pop up, but the program didn't even run. Instead:

"Compile error:"

"Only public user defined types defined in public object modules can be used as parameters or return types for public procedures of class modules or as fields of public user defined types"

The UDT is defined public and my modules are, as far as I know, public and everything in them can be called from frmMain without trouble so it seems public to me.. so what is this talking about, and how can I fix it please?

This capability of using my UDT as a parameter, either ByVal or ByRef (preferably ByRef, but having no luck with either) is vital if I'm to move all my functions out of frmMain and into a module. (Hopefully I will then be able to use the module in other projects which require the same functionality, providing portability and not relying on frmMain being present.. eventually want to mould this into an ActiveX control without just copy/pasting everything into two versions)

Thanks for any light you can shed on this..