


How Can I Control WPF Application Window Positioning Like Rainlendar's 'On Desktop' Feature?
Jan 04, 2025 pm 10:15 PMWPF 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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