Issues #13 Fixed 1024 character limit for GetWindowText function

Author: AlexanderPro

WindowTextExtractor/Native/User32.cs

@@ -42,11 +42,14 @@ static class User32
 
         [DllImport("user32.dll")]
         [return: MarshalAs(UnmanagedType.Bool)]
-        public static extern bool GetClientRect(IntPtr handle, out Rect lpRect);
+        public static extern bool GetClientRect(IntPtr hWnd, out Rect lpRect);
 
         [DllImport("user32.dll", CharSet = CharSet.Auto)]
         public static extern int GetWindowText(IntPtr hWnd, StringBuilder title, int size);
 
+        [DllImport("user32.dll", CharSet = CharSet.Auto)]
+        public static extern int GetWindowTextLength(IntPtr hWnd);
+
         [DllImport("user32.dll")]
         public static extern IntPtr SendMessage(IntPtr hWnd, int msg, uint wParam, uint lParam);
 

WindowTextExtractor/Utils/WindowUtils.cs

@@ -316,7 +316,6 @@ public static void SetTransparency(IntPtr handle, int percent)
             SetOpacity(handle, opacity);
         }
 
-
         public static void SetOpacity(IntPtr handle, byte opacity)
         {
             var exStyle = User32.GetWindowLong(handle, Constants.GWL_EXSTYLE);
@@ -326,10 +325,17 @@ public static void SetOpacity(IntPtr handle, byte opacity)
 
         private static string GetWindowText(IntPtr handle)
         {
-            var builder = new StringBuilder(1024);
-            User32.GetWindowText(handle, builder, builder.Capacity);
-            var windowText = builder.ToString();
-            return windowText;
+            var length = User32.GetWindowTextLength(handle);
+            if (length > 0)
+            {
+                var builder = new StringBuilder(length + 1);
+                User32.GetWindowText(handle, builder, builder.Capacity);
+                return builder.ToString();
+            }
+            else
+            {
+                return string.Empty;
+            }
         }
 
         private static string GetWmGettext(IntPtr handle)