How to Detect System-Wide Drag & Drop Start (Outside App Window) and Show a Popup in a Windows Desktop App (C#)?

[Microsoft Windows]

Hi everyone,We are developing a Windows desktop application using C# in Visual Studio 2022. The application aims to simplify common file operations for users – specifically, converting and compressing images, videos, audio, handling archives, etc. We're striving for the most intuitive user experience possible.We'd like to implement a feature that would significantly streamline the process of getting files into our application. We envision the following scenario:A user clicks on a file (e.g., image, video) on their desktop or in File Explorer.They start dragging the file with the mouse (initiat

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