title: Cross-application drag-and-drop in Delphi
body: <p>I would like to create a Delphi application for Windows XP which allows dropping of files dragged from Windows Explorer (the Desktop or folder windows) or other applications which support this operation (such as Total Commander). What about vice-versa? When the user drags an icon from my application, I should be able to set the contents of the dragged object to custom data.
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  My goal is to create a custom application toolbar, onto which I can drop applications and show their icons or drag applications or other entities from it.
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  How can this be done?</p>