diff --git a/PInvoke/User32/WinUser.System.cs b/PInvoke/User32/WinUser.System.cs
index 2765e40d..1897108c 100644
--- a/PInvoke/User32/WinUser.System.cs
+++ b/PInvoke/User32/WinUser.System.cs
@@ -3722,8 +3722,7 @@ namespace Vanara.PInvoke
 		// https://docs.microsoft.com/en-us/windows/desktop/dlgbox/mb-getstring LPCWSTR WINAPI MB_GetString( UINT wBtn );
 		[DllImport(Lib.User32, SetLastError = false, ExactSpelling = true)]
 		[PInvokeData("", MSDNShortId = "D2AF238D-F5A8-477D-BF47-0F5D4D68B27E")]
-		[return: MarshalAs(UnmanagedType.LPWStr)]
-		public static extern string MB_GetString(uint wBtn);
+		public static extern StrPtrUni MB_GetString(uint wBtn);
 
 		/// <summary>
 		/// <para>Plays a waveform sound. The waveform sound for each sound type is identified by an entry in the registry.</para>
diff --git a/UnitTests/PInvoke/User32/User32Tests.cs b/UnitTests/PInvoke/User32/User32Tests.cs
index 973728a7..4f2322fc 100644
--- a/UnitTests/PInvoke/User32/User32Tests.cs
+++ b/UnitTests/PInvoke/User32/User32Tests.cs
@@ -71,6 +71,13 @@ namespace Vanara.PInvoke.Tests
 			throw new NotImplementedException();
 		}
 
+		[Test()]
+		public void MB_GetStringTest()
+		{
+			Assert.NotNull((string)MB_GetString(1));
+			TestContext.WriteLine((string)MB_GetString(1));
+		}
+
 		[Test()]
 		public void RealGetWindowClassTest()
 		{