From 1cd2b8d0766832aebbe91b35bb1ec2dc70188a6d Mon Sep 17 00:00:00 2001
From: the_fiddler <the_fiddler@ebc5dd9b-fb1d-0410-b6f8-d24c324e9604>
Date: Sat, 7 Nov 2009 10:44:31 +0000
Subject: [PATCH] Use SHOW command instead of SHOWNORMAL when making a window
 visible, since SHOWNORMAL will un-maximize a fullscreen or maximized window.
 Do not force an invisible window to become visible when modifying its state
 or borders.

---
 Source/OpenTK/Platform/Windows/WinGLNative.cs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Source/OpenTK/Platform/Windows/WinGLNative.cs b/Source/OpenTK/Platform/Windows/WinGLNative.cs
index 737d5c9f..cf622365 100644
--- a/Source/OpenTK/Platform/Windows/WinGLNative.cs
+++ b/Source/OpenTK/Platform/Windows/WinGLNative.cs
@@ -810,7 +810,7 @@ namespace OpenTK.Platform.Windows
             {
                 if (value)
                 {
-                    Functions.ShowWindow(window.WindowHandle, ShowWindowCommand.SHOWNORMAL);
+                    Functions.ShowWindow(window.WindowHandle, ShowWindowCommand.SHOW);
                 }
                 else if (!value)
                 {
@@ -989,7 +989,11 @@ namespace OpenTK.Platform.Windows
                     SetWindowPosFlags.NOMOVE | SetWindowPosFlags.NOZORDER |
                     SetWindowPosFlags.FRAMECHANGED);
 
-                Visible = true;
+                // Force window to redraw update its borders, but only if it's
+                // already visible (invisible windows will change borders when
+                // they become visible, so no need to make them visiable prematurely).
+                if (Visible)
+                    Visible = true;
 
                 WindowState = state;