How to handle drag-and-drop to a Win32 application icon?

I have to update a Win32 application in order to handle the drag-and-drop of files over the icon of the executable. I am not sure about how to proceed. A few researches led me to considering the "WM_DROPFILES" message, but MSDN syas it is "Sent when the user drops a file on the window", while I don't want to open a window. Think of a command line tool "MyProgram.exe" : if I drag "MyFile.file" on the windows icon "MyProgram" in the desktop, I wo开发者_StackOverflow中文版uld like it to execute the same way as it would do when typing ">MyProgram MyFile.file" in the command prompt.

Any idea how to achieve this result ?

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While it is true that apps get this for free by parsing the command line, there is a shell interface called IDropTarget you can implement if you need more control. See MSDN and this blog entry for more details.

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Windows does this for you automatically. Any program foo.exe accepts drags of any file.

Martyn