Problem in compiling DLL

[Laxman Rao]

'My Class Module contains this properties

Private WithEvents ocTextBox As TextBox

Public Property Set TextBox(ByVal vData As TextBox)
Set ocTextBox = vData
End Property

Public Property Get TextBox() As TextBox
Set TextBox = ocTextBox
End Property

When i compile this(DLL) it is giving the following error:

Private object modules cannot be used in public object modules as parameters or return types for public procedures as public data members,or as fields of public user defined types.

[itay222]

if i translate that error to simple words,
it says you can't return TextBox (in property get),
the way it is declared (private).

maybe you can change it to public?
maybe you can't really return TextBox data type?
who knows.

[samwise]

I had this exact same problem using VB6, when I tried to pass a ComboBox as a parameter into a subroutine that was in another DLL. Fortunately, I was working at Microsoft at the time, so I went down the hall to one of the people who developed the VB language.
She said that it had something to do with threading. Since a ComboBox is a seperate OCX (a private object module), you will have difficulty in trying to pass it as a parameter.
I was able to get around this by doing the following :

'borrowing your code
Private ocTextBox As Object

Public Property Set TextBox(ByRef vData As Object)
Set ocTextBox = vData
End Property

Public Property Get TextBox() As Object
Set TextBox = ocTextBox
End Property

Using the data type Object, ocTextBox can't be dimensioned as WithEvents, and it will have to be initialized outside of the dll. But it did allow me to pass the object into another dll.

Samwise Galenorn
[email protected]