I am glad I could help.
As to your question, here is the approach I would suggest:
sender, CancelEventArgs e)
Point mouseLocation = radGridView1.PointToClient(Control.MousePosition);
RadElement elementUnderMouse = radGridView1.ElementTree.GetElementAtPoint(mouseLocation);
In general, this code shows how you can get the element of the grid which is under the mouse pointer. When you have this element you can check its type and decide whether you want to cancel the dropdown. You can check the type of a cell by spying it with our RadControlSpy
tool. More information about using it can be found here
I hope this will help you. Do not hesitate to contact me if you have any additional questions.
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