如何使用CefSharp winforms接收拖放、移动和拖放事件

public class CustomDragHandler : CefSharp.Handler.DragHandler
{
    protected override bool OnDragEnter(CefSharp.IWebBrowser chromiumWebBrowser, CefSharp.IBrowser browser, CefSharp.IDragData dragData, CefSharp.DragOperationsMask mask)
    {
        // 处理拖放进入事件
        return base.OnDragEnter(chromiumWebBrowser, browser, dragData, mask);
    }

    protected override void OnDraggableRegionsChanged(CefSharp.IWebBrowser chromiumWebBrowser, CefSharp.IBrowser browser, CefSharp.IFrame frame, CefSharp.DraggableRegion[] regions)
    {
        // 处理可拖放区域变化事件
        base.OnDraggableRegionsChanged(chromiumWebBrowser, browser, frame, regions);
    }
}

// 在窗体加载时设置DragHandler
private void Form1_Load(object sender, EventArgs e)
{
    chromiumWebBrowser1.DragHandler = new CustomDragHandler();
}