diff --git a/Bin/net40/SunnyUI.dll b/Bin/net40/SunnyUI.dll
index 90ef2bec..2fc99357 100644
Binary files a/Bin/net40/SunnyUI.dll and b/Bin/net40/SunnyUI.dll differ
diff --git a/Bin/net45/SunnyUI.dll b/Bin/net45/SunnyUI.dll
index 451ecc61..65d79c97 100644
Binary files a/Bin/net45/SunnyUI.dll and b/Bin/net45/SunnyUI.dll differ
diff --git a/Bin/net5.0-windows/SunnyUI.dll b/Bin/net5.0-windows/SunnyUI.dll
index 20cc265e..0c9d3be6 100644
Binary files a/Bin/net5.0-windows/SunnyUI.dll and b/Bin/net5.0-windows/SunnyUI.dll differ
diff --git a/Bin/net5.0-windows/ref/SunnyUI.dll b/Bin/net5.0-windows/ref/SunnyUI.dll
index b3b19804..be428c6b 100644
Binary files a/Bin/net5.0-windows/ref/SunnyUI.dll and b/Bin/net5.0-windows/ref/SunnyUI.dll differ
diff --git a/Bin/netcoreapp3.1/SunnyUI.dll b/Bin/netcoreapp3.1/SunnyUI.dll
index 7644504c..feab5fc4 100644
Binary files a/Bin/netcoreapp3.1/SunnyUI.dll and b/Bin/netcoreapp3.1/SunnyUI.dll differ
diff --git a/SunnyUI/Controls/UIComboBox.cs b/SunnyUI/Controls/UIComboBox.cs
index b8303984..de5a48f1 100644
--- a/SunnyUI/Controls/UIComboBox.cs
+++ b/SunnyUI/Controls/UIComboBox.cs
@@ -49,6 +49,16 @@ namespace Sunny.UI
             fullControlSelect = true;
         }
 
+        public int FindString(string s)
+        {
+            return ListBox.FindString(s);
+        }
+
+        public int FindStringExact(string s)
+        {
+            return ListBox.FindStringExact(s);
+        }
+
         private void ListBox_ItemsRemove(object sender, EventArgs e)
         {
             if (ListBox.Count == 0)
diff --git a/SunnyUI/Controls/UIListBox.cs b/SunnyUI/Controls/UIListBox.cs
index dba1c6d1..5e5d6d91 100644
--- a/SunnyUI/Controls/UIListBox.cs
+++ b/SunnyUI/Controls/UIListBox.cs
@@ -104,6 +104,16 @@ namespace Sunny.UI
             ItemsClear?.Invoke(this, e);
         }
 
+        public int FindString(string s)
+        {
+            return listbox.FindString(s);
+        }
+
+        public int FindStringExact(string s)
+        {
+            return listbox.FindStringExact(s);
+        }
+
         [Browsable(false)]
         public ListBox ListBox => listbox;