From 9e7b6032bf03e34eccb153e3ad7c636db3688b42 Mon Sep 17 00:00:00 2001
From: lordmilko <lordmilko@users.noreply.github.com>
Date: Wed, 23 Mar 2022 20:04:00 +1100
Subject: [PATCH] Other: Add support for disabling Aero Snap Quadrants on
 Windows 11

---
 ExplorerPatcher/dllmain.c    | 42 ++++++++++++++++++++++++++++++++++++
 ExplorerPatcher/settings.reg |  3 +++
 2 files changed, 45 insertions(+)

diff --git a/ExplorerPatcher/dllmain.c b/ExplorerPatcher/dllmain.c
index b2808bd..ba709b0 100644
--- a/ExplorerPatcher/dllmain.c
+++ b/ExplorerPatcher/dllmain.c
@@ -92,6 +92,7 @@ DWORD bTaskbarAutohideOnDoubleClick = FALSE;
 DWORD dwOrbStyle = 0;
 DWORD bEnableSymbolDownload = TRUE;
 DWORD dwAltTabSettings = 0;
+DWORD bDisableAeroSnapQuadrants = FALSE;
 DWORD dwSnapAssistSettings = 0;
 DWORD dwStartShowClassicMode = 0;
 BOOL bDoNotRedirectSystemToSettingsApp = FALSE;
@@ -1023,6 +1024,23 @@ void ToggleLauncherTipContextMenu()
 #pragma endregion
 
 
+#pragma region "windowsudk.shellcommon Hooks"
+
+static HRESULT(WINAPI *SLGetWindowsInformationDWORDFunc)(PCWSTR pwszValueName, DWORD* pdwValue) = NULL;
+
+HRESULT WINAPI windowsudkshellcommon_SLGetWindowsInformationDWORDHook(PCWSTR pwszValueName, DWORD* pdwValue)
+{
+    HRESULT hr = SLGetWindowsInformationDWORDFunc(pwszValueName, pdwValue);
+
+    if (bDisableAeroSnapQuadrants && !wcsncmp(pwszValueName, L"Shell-Windowing-LimitSnappedWindows", 35))
+        *pdwValue = 1;
+
+    return hr;
+}
+
+#pragma endregion
+
+
 #pragma region "twinui.pcshell.dll hooks"
 #ifdef _WIN64
 #define LAUNCHERTIP_CLASS_NAME L"LauncherTipWnd"
@@ -6166,6 +6184,16 @@ void WINAPI LoadSettings(LPARAM lParam)
             LaunchPropertiesGUI(hModule);
 #endif
         }
+
+        dwSize = sizeof(DWORD);
+        RegQueryValueExW(
+            hKey,
+            TEXT("DisableAeroSnapQuadrants"),
+            0,
+            NULL,
+            &bDisableAeroSnapQuadrants,
+            &dwSize
+        );
         dwSize = sizeof(DWORD);
         RegQueryValueExW(
             hKey,
@@ -9475,6 +9503,20 @@ DWORD Inject(BOOL bIsExplorer)
             VnPatchIAT(hInputSwitch, "user32.dll", "TrackPopupMenuEx", inputswitch_TrackPopupMenuExHook);
             printf("Setup inputswitch functions done\n");
         }
+
+        HANDLE hWindowsudkShellcommon = LoadLibraryW(L"windowsudk.shellcommon.dll");
+        HANDLE hSLC = LoadLibraryW(L"slc.dll");
+        if (hWindowsudkShellcommon && hSLC)
+        {
+            SLGetWindowsInformationDWORDFunc = GetProcAddress(hSLC, "SLGetWindowsInformationDWORD");
+
+            if (SLGetWindowsInformationDWORDFunc)
+            {
+                VnPatchDelayIAT(hWindowsudkShellcommon, "ext-ms-win-security-slc-l1-1-0.dll", "SLGetWindowsInformationDWORD", windowsudkshellcommon_SLGetWindowsInformationDWORDHook);
+            }
+
+            printf("Setup windowsudk.shellcommon functions done\n");
+        }
     }
 
 
diff --git a/ExplorerPatcher/settings.reg b/ExplorerPatcher/settings.reg
index 889bd6e..d85413c 100644
--- a/ExplorerPatcher/settings.reg
+++ b/ExplorerPatcher/settings.reg
@@ -537,6 +537,9 @@
 ;x 4 Restart
 "Start_PowerButtonAction"=dword:00000002
 [HKEY_CURRENT_USER\Software\ExplorerPatcher]
+;b Disable Window Snap Quadrants
+"DisableAeroSnapQuadrants"=dword:00000000
+[HKEY_CURRENT_USER\Software\ExplorerPatcher]
 ;c 2 Snap Assist style
 ;x 0 Windows 11 (default)
 ;x 3 Windows 10