How Can I Control WPF Application Window Positioning Like Rainlendar's 'On Desktop' Feature?

WPF Application Window Positioning Control

In the context of WPF applications, manipulating window positioning offers unique capabilities and challenges. While Rainlendar, a well-known third-party application, features the "on desktop" option, which positions its window behind all other windows, achieving this effect in a WPF application requires a different approach.

In the Win32 API, two distinct window placement scenarios exist:

• On Desktop: The window becomes a child of the Explorer desktop window, known as "Program Manager." This can be achieved using the SetParent API.
• On Bottom: The window remains at the bottom of the Z-order, just above the desktop. Achieving this involves setting the window position initially (using SetWindowPos) and handling the WM_WINDOWPOSCHANGING message to prevent it from coming to the forefront upon user interaction.

To implement this functionality in a WPF application, consider utilizing P/Invoke for the aforementioned Win32 APIs.

Alternatively, explore the use of third-party libraries or implement custom window behavior based on the WM_WINDOWPOSCHANGING message handling approach. By leveraging these techniques, you can effectively control your WPF application window positioning, tailoring it to your specific requirements.

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