Let me explain the situation:

we have a UltraWinGrid placed on a Windows Form. This grid contains one column which has a special column. This column contains a specific control which displays an image.

We added a 'Export to Excel'-button to export the data in the grid to Excel using the UltraWinGrid.ExcelExport.UltraGridExcelExporter-class.

We perform this export in a separate thread because this operation can take a while and we don't want to 'freeze' our main UI-thread.

Now our problem: when we execute the export we get the following error :

Message: Controls created on one thread cannot be parented to a control on a different thread.
Stack Trace:
at System.Windows.Forms.Control.ControlCollection.Add(Control value)
at Infragistics.Win.ControlContainerEditor.GetRendererImage(Size imageSize, EmbeddableEditorOwnerBase owner, Object ownerContext, ControlContainerEmbeddableUIElement controlContainerEmbeddableUIElement)
at Infragistics.Win.UltraWinGrid.GridExportCache.GetControlContainerEditorImage(Size imageSize, UltraGridRow gridRow, UltraGridColumn gridColumn, Object exportValue)
at Infragistics.Win.UltraWinGrid.ExcelExport.UltraGridExcelExporter.WriteValueCell(UltraGridExporterHelper exportHelper, UltraGridRow row, UltraGridColumn ugColumn, Rectangle valueCellRect)

...

When I remove the image-column in the grid or replace it with a classic checkbox-control, it all works well.

So when the grid-data is exported in a separate thread, somehow the control in the main thread is addressed and this error occurs.

So my question: is this a known problem ? Or is there a event we have to capture in our control ?

I already worked with the InvokeRequired()-function in my control-events, but no resolution...