How Can I Implement a WPF Window's 'On Desktop' Functionality Using Win32 API?

WPF Application Implementation of Window "On Desktop"

In order to mimic the "On Desktop" functionality found in Rainlendar, which places a window at the bottom of the Z-order directly above the desktop, the Win32 API can be employed. This technique involves two primary steps.

Firstly, to position the window as a subordinate of the Explorer desktop window, the SetParent API can be utilized. This allows the window to become a child window of the desktop, giving it the desired "On Desktop" effect.

Secondly, to prevent the window from rising to the forefront upon user interaction, the WM_WINDOWPOSCHANGING message should be intercepted and handled. This message is triggered whenever the window's position or size is about to be modified, providing an opportunity to adjust the window's Z-order accordingly.

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