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POHandling VB.NET events in VB6 code
 

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    <p>I have some VB6 code that instantiates a class which handles events that are being raised from a VB.NET component. The VB6 is pretty straightforward:</p> <pre><code>private m_eventHandler as new Collection ... public sub InitSomething() dim handler as EventHandler set handler = new EventHandler m_eventHandler.Add handler ... m_engine.Start end sub </code></pre> <p>Note that the event handler object has to live beyond the scope of the init method (which is why it is being stored in a Collection). Note also that <code>m_engine.Start</code> indicates the point in the program where the VB.NET component would start raising events.</p> <p>The actual event handler (as requested):</p> <pre><code>Private WithEvents m_SomeClass As SomeClass Private m_object as Object ... Private Sub m_SomeClass_SomeEvent(obj As Variant) Set obj = m_object End Sub </code></pre> <p>Note that <code>m_object</code> is initialized when an instance of <code>EventHandler</code> is created. </p> <p>The VB.NET code which raises the event is even simpler:</p> <pre><code>Public ReadOnly Property SomeProp() As Object Get Dim obj As Object obj = Nothing RaiseEvent SomeEvent(obj) SomeProp = obj End Get End Property </code></pre> <p>My problem is that when I <strong>debug</strong> the VB6 program, the first time <code>InitSomething</code> gets called, the event will <strong>not</strong> be handled (the VB6 event handler is never entered). Subsequent calls to <code>InitSomething</code> does work.</p> <p>Everything works as I would have expected when I run the program outside the debugger. At this point, I'm not even sure if this is something I should be worried about.</p> <p>It may or may not be relevant but the VB.NET was converted from a VB6 using the Visual Studio code conversion tool (and subsequently manually cleaned up).</p>
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    1. COCan you show the actual event handler and the declaration of the handling object? (that one with "WithEvents")?
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      1. USDaniel Rikowski
 

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