How can I avoid repeating this code in each of my forms?

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C#

I have the code below to round off the edges of my form.

I have several forms and this code is present on each of them

Is it possible to put this code in a class and call it in each of the forms to simplify?

private int borderRadius = 30;
private int borderSize = 4;
private Color borderColor = Color.FromArgb(240, 185, 11);

[DllImport("user32.DLL", EntryPoint = "ReleaseCapture")]
private extern static void ReleaseCapture();
[DllImport("user32.DLL", EntryPoint = "SendMessage")]
private extern static void SendMessage(System.IntPtr hWnd, int wMsg, int wParam, int lParam);
private void FMain_MouseDown(object sender, MouseEventArgs e)
{
    ReleaseCapture();
    SendMessage(this.Handle, 0x112, 0xf012, 0);
}
private GraphicsPath GetRoundedPath(Rectangle rect, float radius)
{
    GraphicsPath path = new GraphicsPath();
    float curveSize = radius * 2F;

    path.StartFigure();
    path.AddArc(rect.X, rect.Y, curveSize, curveSize, 180, 90);
    path.AddArc(rect.Right - curveSize, rect.Y, curveSize, curveSize, 270, 90);
    path.AddArc(rect.Right - curveSize, rect.Bottom - curveSize, curveSize, curveSize, 0, 90);
    path.AddArc(rect.X, rect.Bottom - curveSize, curveSize, curveSize, 90, 90);
    path.CloseFigure();
    return path;
}
private void FormRegionAndBorder(Form form, float radius, Graphics graph, Color borderColor, float borderSize)
{
    if (this.WindowState != FormWindowState.Minimized)
    {
        using (GraphicsPath roundPath = GetRoundedPath(form.ClientRectangle, radius))
        using (Pen penBorder = new Pen(borderColor, borderSize))
        using (Matrix transform = new Matrix())
        {
            graph.SmoothingMode = SmoothingMode.AntiAlias;
            form.Region = new Region(roundPath);
            if (borderSize >= 1)
            {
                Rectangle rect = form.ClientRectangle;
                float scaleX = 1.0F - ((borderSize + 1) / rect.Width);
                float scaleY = 1.0F - ((borderSize + 1) / rect.Height);

                transform.Scale(scaleX, scaleY);
                transform.Translate(borderSize / 1.6F, borderSize / 1.6F);

                graph.Transform = transform;
                graph.DrawPath(penBorder, roundPath);
            }
        }
    }
}

private void FMain_Paint(object sender, PaintEventArgs e)
{
    FormRegionAndBorder(this, borderRadius, e.Graphics, borderColor, borderSize);
}

What I have tried:

I tried this but I get several errors.. Am I on the right track?

using Bybit.Net.Enums;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using static MetroFramework.Drawing.MetroPaint;

namespace BasicProject
{

    public class Rounded
    {
        private int borderRadius = 30;
        private int borderSize = 4;
        private Color borderColor = Color.FromArgb(240, 185, 11);
    }

    [DllImport("user32.DLL", EntryPoint = "ReleaseCapture")]
    private extern static void ReleaseCapture();
    [DllImport("user32.DLL", EntryPoint = "SendMessage")]
    private extern static void SendMessage(System.IntPtr hWnd, int wMsg, int wParam, int lParam);
    private void FMain_MouseDown(object sender, MouseEventArgs e)
    {
        ReleaseCapture();
        SendMessage(this.Handle, 0x112, 0xf012, 0);
    }
    private GraphicsPath GetRoundedPath(Rectangle rect, float radius)
    {
        GraphicsPath path = new GraphicsPath();
        float curveSize = radius * 3F;

        path.AddArc(rect.X, rect.Y, curveSize, curveSize, 180, 80);
        path.AddArc(rect.Right - curveSize, rect.Y, curveSize, curveSize, 270, 80);
        path.AddArc(rect.Right - curveSize, rect.Bottom - curveSize, curveSize, curveSize, 0, 80);
        path.AddArc(rect.X, rect.Bottom - curveSize, curveSize, curveSize, 80, 80);
        return path;
    }
    private void FormRegionAndBorder(Form form, float radius, Graphics graph, Color borderColor, float borderSize)
    {
        if (this.WindowState != FormWindowState.Minimized)
        {
            using (GraphicsPath roundPath = GetRoundedPath(form.ClientRectangle, radius))
            using (Pen penBorder = new Pen(borderColor, borderSize))
            using (Matrix transform = new Matrix())
            {
                graph.SmoothingMode = SmoothingMode.AntiAlias;
                form.Region = new Region(roundPath);
                if (borderSize >= 2)
                {
                    Rectangle rect = form.ClientRectangle;
                    float scaleX = 1.0F - ((borderSize + 2) / rect.Width);
                    float scaleY = 1.0F - ((borderSize + 2) / rect.Height);

                    transform.Translate(borderSize / 1.6F, borderSize / 1.6F);
                    graph.DrawPath(penBorder, roundPath);
                }
            }
        }
    }

    private void FMain_Paint(object sender, PaintEventArgs e)
    {
        FormRegionAndBorder(this, borderRadius, e.Graphics, borderColor, borderSize);
    }