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LabVIEW LIB & examples that use custom WinAPI.dll.
WinAPI.dll (GitHub) consists of Windows API functions (user32 and shell32) for Window, Taskbar, Screens, etc, conveniently organized and wrapped in a C# DLL (InteropAssembly).
The file WinAPI.dll is in folder DLL and it can be moved elsewhere, but you'll have to browse to it in the .NET constructor node.
More elaborate example VIs are in folder Examples.
WinAPI-LV snippets and more info (GitHub).
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WinAPI.dll source code (GitHub)
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Example code from the Example Code Exchange in the NI Community is licensed with the MIT license.