C# How to fix a form in the background (Like Gadget)?

Question

C++ / C#

Hello, I want to create something like a widget (gadget) on the desktop in C #,
but the question arose of how to fix the window on the desktop? So that it can not be raised above the rest of the windows

Answer 1

public partial class Form1 : Form
    {
        [DllImport("user32.dll")]
        static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);

        static readonly IntPtr HWND_BOTTOM = new IntPtr(1);
        const UInt32 SWP_NOSIZE = 0x0001;
        const UInt32 SWP_NOMOVE = 0x0002;
        const UInt32 SWP_NOACTIVATE = 0x0010;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            SetWindowPos(Handle, HWND_BOTTOM, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
        }

        private void Form1_Activated(object sender, EventArgs e)
        {
            SetWindowPos(Handle, HWND_BOTTOM, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
        }
    }

Answer 2

So what's stopping you from writing a widget?
Example