diff --git a/typescript/index.ts b/typescript/index.ts
index 237316ddc..b5dff7b9c 100644
--- a/typescript/index.ts
+++ b/typescript/index.ts
@@ -20,6 +20,8 @@ import { _TextValueCombo, _TextValueComboStatic } from "./case/combo/combo.textv
 import { _SignEditor, _SignEditorStatic } from "./case/editor/editor.sign";
 import { _LoadingPane } from "./case/loading/loading_pane";
 import { _AllValueMultiTextValueCombo, _AllValueMultiTextValueComboStatic } from "./component/allvaluemultitextvaluecombo/allvalue.multitextvalue.combo";
+import { _AbstractTreeValueChooser } from "./component/treevaluechooser/abstract.treevaluechooser";
+import { _AbstractListTreeValueChooser } from "./component/treevaluechooser/abstract.treevaluechooser.list";
 import { _Action, _ActionFactory } from "./core/action/action";
 import { _ShowAction } from "./core/action/action.show";
 import { _base } from "./core/base";
@@ -33,8 +35,7 @@ import { _OB } from "./core/ob";
 import { _Widget, _WidgetStatic } from "./core/widget";
 import { _Layout } from "./core/wrapper/layout";
 import { _HTapeLayout, _VTapeLayout } from "./core/wrapper/layout/layout.tape";
-import { _AbstractTreeValueChooser } from "./component/treevaluechooser/abstract.treevaluechooser";
-import { _AbstractListTreeValueChooser } from "./component/treevaluechooser/abstract.treevaluechooser.list";
+import { _DownListCombo, _DownListComboStatic } from "./widget/downlist/combo.downlist";
 
 
 type ClassConstructor<T extends {}> = T & {
@@ -81,6 +82,7 @@ export interface BI extends _func, _i18n, _base {
     AbstractTreeValueChooser: ClassConstructor<_AbstractTreeValueChooser>;
     AbstractListTreeValueChooser: ClassConstructor<_AbstractListTreeValueChooser>;
     Decorators: typeof decorator;
+    DownListCombo: ClassConstructor<_DownListCombo> & _DownListComboStatic;
 }
 
 export default {
diff --git a/typescript/widget/downlist/combo.downlist.ts b/typescript/widget/downlist/combo.downlist.ts
new file mode 100644
index 000000000..eec23e9be
--- /dev/null
+++ b/typescript/widget/downlist/combo.downlist.ts
@@ -0,0 +1,15 @@
+import { _Widget } from "typescript/core/widget";
+
+export interface _DownListCombo extends _Widget {
+    hideView: () => void;
+
+    showView: (e?: any) => void;
+
+    populate: (items?: any) => void;
+}
+
+export interface _DownListComboStatic {
+    EVENT_CHANGE: string;
+    EVENT_SON_VALUE_CHANGE: string;
+    EVENT_BEFORE_POPUPVIEW: string;
+}
\ No newline at end of file