From c91a9fae67715496af7a9ade63f678fffcefa23a Mon Sep 17 00:00:00 2001
From: David Hall <dahall@byu.net>
Date: Mon, 14 Jan 2019 14:44:10 -0700
Subject: [PATCH] Made Show() HWND parameters optional

---
 PInvoke/Shell32/ShObjIdl.IFileDialog.cs | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/PInvoke/Shell32/ShObjIdl.IFileDialog.cs b/PInvoke/Shell32/ShObjIdl.IFileDialog.cs
index 70725220..f467ad5a 100644
--- a/PInvoke/Shell32/ShObjIdl.IFileDialog.cs
+++ b/PInvoke/Shell32/ShObjIdl.IFileDialog.cs
@@ -238,7 +238,7 @@ namespace Vanara.PInvoke
 			/// HRESULT_FROM_WIN32(ERROR_CANCELLED) = The user closed the window by canceling the operation.
 			/// </returns>
 			[PreserveSig]
-			new HRESULT Show(HWND parent);
+			new HRESULT Show([Optional] HWND parent);
 
 			/// <summary>Sets the file types that the dialog can open or save.</summary>
 			/// <param name="cFileTypes">The number of elements in the array specified by rgFilterSpec.</param>
@@ -379,7 +379,7 @@ namespace Vanara.PInvoke
 			/// HRESULT_FROM_WIN32(ERROR_CANCELLED) = The user closed the window by canceling the operation.
 			/// </returns>
 			[PreserveSig]
-			new HRESULT Show(HWND parent);
+			new HRESULT Show([Optional] HWND parent);
 
 			/// <summary>Sets the file types that the dialog can open or save.</summary>
 			/// <param name="cFileTypes">The number of elements in the array specified by rgFilterSpec.</param>
@@ -814,7 +814,7 @@ namespace Vanara.PInvoke
 			/// HRESULT_FROM_WIN32(ERROR_CANCELLED) = The user closed the window by canceling the operation.
 			/// </returns>
 			[PreserveSig]
-			new HRESULT Show(HWND parent);
+			new HRESULT Show([Optional] HWND parent);
 
 			/// <summary>Sets the file types that the dialog can open or save.</summary>
 			/// <param name="cFileTypes">The number of elements in the array specified by rgFilterSpec.</param>
@@ -1171,7 +1171,7 @@ namespace Vanara.PInvoke
 			/// HRESULT_FROM_WIN32(ERROR_CANCELLED) = The user closed the window by canceling the operation.
 			/// </returns>
 			[PreserveSig]
-			new HRESULT Show(HWND parent);
+			new HRESULT Show([Optional] HWND parent);
 
 			/// <summary>Sets the file types that the dialog can open or save.</summary>
 			/// <param name="cFileTypes">The number of elements in the array specified by rgFilterSpec.</param>
@@ -1343,7 +1343,7 @@ namespace Vanara.PInvoke
 			/// HRESULT_FROM_WIN32(ERROR_CANCELLED) = The user closed the window by cancelling the operation.
 			/// </returns>
 			[PreserveSig]
-			HRESULT Show(HWND parent);
+			HRESULT Show([Optional] HWND parent);
 		}
 
 		/// <summary>Used generically to filter elements.</summary>