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DragDrop registration did not succeed

I am using Visual Studio 2005.

In the event handler of a Timer on a form I am setting some of the fields visible. But I get a "DragDrop registration did not succeed" error. This does not happen if I just the fields' enabled property.

Can someone please tell me what I need to do?

Mike Tomlinson

What does your form do?

Can you show us the code in the Timer event?

emdsft

ASKER

Actually its not a timer but an event from a DLL

Private Sub Core_Tufter_YarnFeedEnabledChanged(ByVal Index As Integer, ByVal Enabled As Boolean)
Core.StatusPnlArray(Index).Enabled = Enabled
Core.SettingsValLblArray(Index).Visible= Enabled '// This is where I get the error.
Core.FeedTypeLblArray(Index).Visible= Enabled
If Not Enabled Then
Core.StatusPnlArray(Index).BackgroundImage = My.Resources.YarnFeed_Gray
Core.SettingsValLblArray(Index).Text = ""
Core.FeedTypeLblArray(Index).Text = ""
End If
End Sub

I have set Control.CheckForIllegalCrossThreadCalls = False in Form Load.

ASKER CERTIFIED SOLUTION

Mike Tomlinson

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Mike Tomlinson

In general,

Control.CheckForIllegalCrossThreadCalls = False

is a BAD idea. That is why it is True by default.