diff --git a/Core/InteropServices/SafeCoTaskMemHandle.cs b/Core/InteropServices/SafeCoTaskMemHandle.cs
index 35e6035b..b735dd72 100644
--- a/Core/InteropServices/SafeCoTaskMemHandle.cs
+++ b/Core/InteropServices/SafeCoTaskMemHandle.cs
@@ -82,7 +82,7 @@ namespace Vanara.InteropServices
 		/// <typeparam name="T">Native type</typeparam>
 		/// <param name="value">The value.</param>
 		/// <returns><see cref="SafeCoTaskMemHandle"/> object to an native (unmanaged) memory block the size of T.</returns>
-		public static SafeCoTaskMemHandle CreateFromStructure<T>(T value = default) => new SafeCoTaskMemHandle(InteropExtensions.StructureToPtr(value, new CoTaskMemoryMethods().AllocMem, out int s), s);
+		public static SafeCoTaskMemHandle CreateFromStructure<T>(in T value = default) => new SafeCoTaskMemHandle(InteropExtensions.StructureToPtr(value, new CoTaskMemoryMethods().AllocMem, out int s), s);
 
 		/// <summary>
 		/// Allocates from unmanaged memory to represent a structure with a variable length array at the end and marshal these structure elements. It is the
diff --git a/Core/InteropServices/SafeHGlobalHandle.cs b/Core/InteropServices/SafeHGlobalHandle.cs
index c04e44d6..d7abaf5b 100644
--- a/Core/InteropServices/SafeHGlobalHandle.cs
+++ b/Core/InteropServices/SafeHGlobalHandle.cs
@@ -81,7 +81,7 @@ namespace Vanara.InteropServices
 		/// <typeparam name="T">Native type</typeparam>
 		/// <param name="value">The value.</param>
 		/// <returns><see cref="SafeHGlobalHandle"/> object to an native (unmanaged) memory block the size of T.</returns>
-		public static SafeHGlobalHandle CreateFromStructure<T>(T value = default) => new SafeHGlobalHandle(InteropExtensions.StructureToPtr(value, new HGlobalMemoryMethods().AllocMem, out int s), s);
+		public static SafeHGlobalHandle CreateFromStructure<T>(in T value = default) => new SafeHGlobalHandle(InteropExtensions.StructureToPtr(value, new HGlobalMemoryMethods().AllocMem, out int s), s);
 
 		/// <summary>
 		/// Allocates from unmanaged memory to represent a structure with a variable length array at the end and marshal these structure elements. It is the
diff --git a/PInvoke/Kernel32/HeapApi.cs b/PInvoke/Kernel32/HeapApi.cs
index 67deb58f..6de41efa 100644
--- a/PInvoke/Kernel32/HeapApi.cs
+++ b/PInvoke/Kernel32/HeapApi.cs
@@ -1527,7 +1527,7 @@ namespace Vanara.PInvoke
 			/// <typeparam name="T">Native type</typeparam>
 			/// <param name="value">The value.</param>
 			/// <returns><see cref="SafeHeapBlock"/> object to an native (unmanaged) memory block the size of T.</returns>
-			public static SafeHeapBlock CreateFromStructure<T>(T value = default) => new SafeHeapBlock(InteropExtensions.StructureToPtr(value, new CoTaskMemoryMethods().AllocMem, out int s), s);
+			public static SafeHeapBlock CreateFromStructure<T>(in T value = default) => new SafeHeapBlock(InteropExtensions.StructureToPtr(value, new CoTaskMemoryMethods().AllocMem, out int s), s);
 
 			/// <summary>Converts an <see cref="IntPtr"/> to a <see cref="SafeHeapBlock"/> where it owns the reference.</summary>
 			/// <param name="ptr">The <see cref="IntPtr"/>.</param>
diff --git a/PInvoke/Kernel32/InteropServices/SafeLocalHandle.cs b/PInvoke/Kernel32/InteropServices/SafeLocalHandle.cs
index 2be9b44c..1a7c31cf 100644
--- a/PInvoke/Kernel32/InteropServices/SafeLocalHandle.cs
+++ b/PInvoke/Kernel32/InteropServices/SafeLocalHandle.cs
@@ -113,7 +113,7 @@ namespace Vanara.InteropServices
 		/// <typeparam name="T">Native type</typeparam>
 		/// <param name="value">The value.</param>
 		/// <returns><see cref="SafeLocalHandle"/> object to an native (unmanaged) memory block the size of T.</returns>
-		public static SafeLocalHandle CreateFromStructure<T>(T value = default) => new SafeLocalHandle(InteropExtensions.StructureToPtr(value, new LocalMemoryMethods().AllocMem, out var s), s);
+		public static SafeLocalHandle CreateFromStructure<T>(in T value = default) => new SafeLocalHandle(InteropExtensions.StructureToPtr(value, new LocalMemoryMethods().AllocMem, out var s), s);
 
 		/// <summary>Converts an <see cref="IntPtr"/> to a <see cref="SafeLocalHandle"/> where it owns the reference.</summary>
 		/// <param name="ptr">The <see cref="IntPtr"/>.</param>