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>>A final note, Dmitry: you can put the Drag and Drop logic to any visual control (a shape, a textbox, a label, etc.). You may set an area in your form and tell your users "Drop your files here!", or something like that. It does not need to be the whole form.
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>Thank you. I hope this Drag and Drop works on Windows 10 too (I am still using Windows 7).

Don't worry, Dmitry. It works on W10 without a problem.