diff --git a/SmartContextMenu/Native/User32.cs b/SmartContextMenu/Native/User32.cs
index bd83111..b53bd72 100644
--- a/SmartContextMenu/Native/User32.cs
+++ b/SmartContextMenu/Native/User32.cs
@@ -33,6 +33,9 @@ static class User32
         [DllImport("user32.dll", CharSet = CharSet.Auto)]
         public static extern int GetWindowText(IntPtr handle, StringBuilder title, int size);
 
+        [DllImport("user32.dll", CharSet = CharSet.Auto)]
+        public static extern int GetWindowTextLength(IntPtr handle);
+
         [DllImport("user32.dll", CharSet = CharSet.Auto)]
         public static extern int GetClassName(IntPtr handle, StringBuilder className, int size);
 
diff --git a/SmartContextMenu/Utils/WindowUtils.cs b/SmartContextMenu/Utils/WindowUtils.cs
index 06cf86b..d37b5f4 100644
--- a/SmartContextMenu/Utils/WindowUtils.cs
+++ b/SmartContextMenu/Utils/WindowUtils.cs
@@ -324,10 +324,17 @@ public static void SetOpacity(IntPtr hWnd, byte opacity)
 
         public static string GetWindowText(IntPtr hWnd)
         {
-            var builder = new StringBuilder(1024);
-            User32.GetWindowText(hWnd, builder, builder.Capacity);
-            var windowText = builder.ToString();
-            return windowText;
+            var length = GetWindowTextLength(hWnd);
+            if (length > 0)
+            {
+                var builder = new StringBuilder(length + 1);
+                User32.GetWindowText(hWnd, builder, builder.Capacity);
+                return builder.ToString();
+            }
+            else
+            {
+                return string.Empty;
+            }
         }
 
         public static string GetClassName(IntPtr hWnd)