From 2b4cfee7e23dd2c2cbb30b2c1e1961cfd7dbfcc8 Mon Sep 17 00:00:00 2001
From: dahall <dahall@byu.net>
Date: Mon, 25 Jan 2021 12:10:13 -0700
Subject: [PATCH] Added SafeMemStruct.InitializeSizeField method to initialize
 an in-memory structure's size field

---
 Core/InteropServices/SafeMemStruct.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Core/InteropServices/SafeMemStruct.cs b/Core/InteropServices/SafeMemStruct.cs
index 50e280f7..f6c55773 100644
--- a/Core/InteropServices/SafeMemStruct.cs
+++ b/Core/InteropServices/SafeMemStruct.cs
@@ -153,6 +153,10 @@ namespace Vanara.InteropServices
 		/// </returns>
 		public virtual TStruct GetValueOrDefault(in TStruct defaultValue = default) => HasValue ? Value : defaultValue;
 
+		/// <summary>Initializes the size field by the specified name or the first four bytes of the structure's memory.</summary>
+		/// <param name="fieldName">Name of the field.</param>
+		public virtual void InitializeSizeField(string fieldName = null) => (fieldName is null ? handle : GetFieldAddress(fieldName)).Write((uint)BaseStructSize);
+
 		/// <summary>Returns the string value held by this instance.</summary>
 		/// <returns>A <see cref="System.String"/> value held by this instance or <c>null</c> if the handle is invalid.</returns>
 		public override string ToString() => ((TStruct?)this).ToString();