添加项目文件。

DotNet.RevitUI/Helper/MainHelper.cs

@@ -0,0 +1,51 @@
+using Autodesk.Windows;
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Windows;
+using UIFrameworkServices;
+
+namespace DotNet.RevitUI.Helper
+{
+    /// <summary>
+    /// Revit UI helper.
+    /// </summary>
+
+    public static class MainHelper
+    {
+        const int MDI_ID = 0x0000E900;
+
+        const int StatusBar_ID = 0x0000E801;
+
+        const int OptionsBar_ID = 0x000EC801;
+
+        [DllImport("user32")]
+        static extern IntPtr GetDlgItem(IntPtr hWndParent, int cid);
+
+        /// <summary>
+        /// Revit 主窗口句柄.
+        /// </summary>
+        public static IntPtr RevitHandle = ComponentManager.ApplicationWindow;
+
+        /// <summary>
+        /// Revit MDI句柄.
+        /// </summary>
+        public static IntPtr RevitMDIHandle = GetDlgItem(ComponentManager.ApplicationWindow, MDI_ID);
+
+        /// <summary>
+        /// Revit StatusBar句柄.
+        /// </summary>
+        public static IntPtr RevitStatusBarHandle = GetDlgItem(ComponentManager.ApplicationWindow, StatusBar_ID);
+
+        /// <summary>
+        /// Revit OptionsBar句柄
+        /// </summary>
+        public static IntPtr RevitOptionsBarHandle = GetDlgItem(ComponentManager.ApplicationWindow, OptionsBar_ID);
+
+        /// <summary>
+        /// Revit MDI rect.
+        /// </summary>
+        public static Rect RevitMDIRect = FloatingService.getMDIClientRect();
+    }
+}