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/// <para>The DestroyWindow function destroys the specified window. The function sends WM_DESTROY and WM_NCDESTROY messages to the window to deactivate it and remove the keyboard focus from it. The function also destroys the window's menu, flushes the thread message queue, destroys timers, removes clipboard ownership, and breaks the clipboard viewer chain (if the window is at the top of the viewer chain).</para>

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/// <para>If the specified window is a parent or owner window, DestroyWindow automatically destroys the associated child or owned windows when it destroys the parent or owner window. The function first destroys child or owned windows, and then it destroys the parent or owner window.</para>

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/// <para>DestroyWindow also destroys modeless dialog boxes created by the CreateDialog function.</para>

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static extern bool DestroyWindow(IntPtr hwnd);

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''' <para>The DestroyWindow function destroys the specified window. The function sends WM_DESTROY and WM_NCDESTROY messages to the window to deactivate it and remove the keyboard focus from it. The function also destroys the window's menu, flushes the thread message queue, destroys timers, removes clipboard ownership, and breaks the clipboard viewer chain (if the window is at the top of the viewer chain).</para>

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''' <para>If the specified window is a parent or owner window, DestroyWindow automatically destroys the associated child or owned windows when it destroys the parent or owner window. The function first destroys child or owned windows, and then it destroys the parent or owner window.</para>

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''' <para>DestroyWindow also destroys modeless dialog boxes created by the CreateDialog function.</para>

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Private Shared Function DestroyWindow(hwnd As IntPtr) As <MarshalAs(UnmanagedType.Bool)> Boolean

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static extern bool DestroyWindow(IntPtr hWnd);

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     DestroyWindow(this.Handle);

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Documentation

[DestroyWindow] on MSDN

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WM_NCDESTROY

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The WM_NCDESTROY message informs a window that its nonclient area is being destroyed. The DestroyWindow function sends the WM_NCDESTROY message to the window following the WM_DESTROY message. WM_DESTROY is used to free the allocated memory object associated with the window.

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    /// The WM_NCDESTROY message informs a window that its nonclient area is being destroyed. The DestroyWindow function sends the WM_NCDESTROY message to the window following the WM_DESTROY message. WM_DESTROY is used to free the allocated memory object associated with the window.

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    '''The WM_NCDESTROY message informs a window that its nonclient area is being destroyed. The DestroyWindow function sends the WM_NCDESTROY message to the window following the WM_DESTROY message. WM_DESTROY is used to free the allocated memory object associated with the window.

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    ''' The <c>DestroyWindow</c> function sends the <see cref="WmNcDestroy"/> message to the