新增了UI节点

Library/Api/IEmbeddedContent.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.Library.Api
+{
+
+    /// <summary>
+    /// 流程中的控件
+    /// </summary>
+    public interface IFlowControl
+    {
+        /// <summary>
+        /// 节点执行事件
+        /// </summary>
+        void OnExecuting(object data);
+
+    }
+
+    /// <summary>
+    /// 自定义UI显示
+    /// </summary>
+    public interface IEmbeddedContent
+    {
+        /// <summary>
+        /// 获取用户控件（WPF）
+        /// </summary>
+        object GetUserControl();
+
+        /// <summary>
+        /// 获取窗体控件
+        /// </summary>
+        /// <returns></returns>
+        IFlowControl GetFlowControl();
+
+   
+    }
+
+}