NativeWindowBase

NativeWindowBase.cs

using System;
using System.Windows.Forms;

public class NativeWindowBase : NativeWindow, IDisposable
{
    private bool isDisposed;
    private readonly Control owner;

    public NativeWindowBase(Control owner) {
        this.owner = owner;
        if (owner.IsHandleCreated) {
            AssignHandle(owner.Handle);
        }
        owner.HandleCreated += Owner_HandleCreated;
        owner.HandleDestroyed += Owner_HandleDestroyed;
    }

    private void Owner_HandleCreated(object sender, EventArgs e) {
        AssignHandle(owner.Handle);
    }

    private void Owner_HandleDestroyed(object sender, EventArgs e) {
        ReleaseHandle();
    }

    public Control Owner { get { return owner; } }
    public bool IsDisposed { get { return isDisposed; } }

    private void DisposeCallder(bool disposing) {
        if (!isDisposed) {
            isDisposed = true;
            owner.HandleCreated -= Owner_HandleCreated;
            owner.HandleDestroyed -= Owner_HandleDestroyed;
            ReleaseHandle();
            Dispose(disposing);
        }
    }

    protected virtual void Dispose(bool disposing) { }

    public void Dispose() {
        DisposeCallder(true);
        GC.SuppressFinalize(this);
    }
}