From 59a62aaaf07db8ec74f0df25e96c70d105e8ed27 Mon Sep 17 00:00:00 2001
From: "Andrew P. Harper" <115321970+KoopaCode@users.noreply.github.com>
Date: Wed, 4 Mar 2026 21:37:47 -0500
Subject: [PATCH] Update Windows64_Minecraft.cpp

Fixes ALT+Enter not being persistent like F11
---
 .../Windows64/Windows64_Minecraft.cpp         | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/Minecraft.Client/Windows64/Windows64_Minecraft.cpp b/Minecraft.Client/Windows64/Windows64_Minecraft.cpp
index 49c43ceac..1784f9642 100644
--- a/Minecraft.Client/Windows64/Windows64_Minecraft.cpp
+++ b/Minecraft.Client/Windows64/Windows64_Minecraft.cpp
@@ -823,6 +823,23 @@ HRESULT InitDevice()
 	}
 	if( FAILED( hr ) )
 		return hr;
+	
+	IDXGIDevice* dxgiDevice = NULL;
+	if (SUCCEEDED(g_pd3dDevice->QueryInterface(__uuidof(IDXGIDevice), (void**)&dxgiDevice)) && dxgiDevice)
+	{
+		IDXGIAdapter* dxgiAdapter = NULL;
+		if (SUCCEEDED(dxgiDevice->GetParent(__uuidof(IDXGIAdapter), (void**)&dxgiAdapter)) && dxgiAdapter)
+		{
+			IDXGIFactory* dxgiFactory = NULL;
+			if (SUCCEEDED(dxgiAdapter->GetParent(__uuidof(IDXGIFactory), (void**)&dxgiFactory)) && dxgiFactory)
+			{
+				dxgiFactory->MakeWindowAssociation(g_hWnd, DXGI_MWA_NO_ALT_ENTER);
+				dxgiFactory->Release();
+			}
+			dxgiAdapter->Release();
+		}
+		dxgiDevice->Release();
+	}
 
 	// Create a render target view
 	ID3D11Texture2D* pBackBuffer = NULL;
@@ -1597,6 +1614,13 @@ int APIENTRY _tWinMain(_In_ HINSTANCE hInstance,
 			ToggleFullscreen();
 		}
 
+		// Alt+Enter Toggle fullscreen 
+		if (g_KBMInput.IsKeyPressed(VK_RETURN) &&
+			(g_KBMInput.IsKeyDown(VK_LMENU) || g_KBMInput.IsKeyDown(VK_RMENU)))
+		{
+			ToggleFullscreen();
+		}
+
 		// TAB opens game info menu. - Vvis :3 - Updated by detectiveren
 		if (g_KBMInput.IsKeyPressed(VK_TAB) && !ui.GetMenuDisplayed(0))
 		{