how to use Option Strict On and Late Binding

Question

I am trying to get some code to compile after switching Option Strict On. However I am using some Interop with VB6 and passing in a form object ByRef so Form.Caption fails and I can't convert it to type Form because a VB.NET Form doesn't have a caption property.

How can I can get the following to compile with Option Strict ON:

Public Sub EditFormLegacy(ByRef objForm As Object)

    objForm.Caption = objForm.Caption + " Edited"

End Sub

Is there any way to switch option strict off for specific methods?

possible duplicate of [VB.Net equivalent for C# 'dynamic' with Option Strict On](http://stackoverflow.com/questions/2889974/vb-net-equivalent-for-c-dynamic-with-option-strict-on) — Hans Passant, Jun 16 '11 at 08:57

score 3 · Accepted Answer · answered Jun 16 '11 at 08:39

You can't turn it off for a method, but you can turn if off for a form or class. Just put "option strict off" at the top of the form. Per MSDN - "If used, the Option Strict statement must appear in a file before any other source code statements." HTH

score 0 · Answer 2 · answered Jun 16 '11 at 09:56

0

You really want to leave option Strict on, so I guess you should try a workaround. For example, get the form (with the caption) to store it's Caption in a seperate string, which can be recalled by the new class loading in the form.

answered Jun 16 '11 at 09:56

BertvanDorp

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1
9

I don't see how that would work because the .NET side will still not know what type of object is being passed – Matt Wilko Jun 16 '11 at 13:08

how to use Option Strict On and Late Binding

2 Answers2