From c1af3103b058dbab88f871483b7720ac3b4a02b3 Mon Sep 17 00:00:00 2001
From: Valentin Radu <valentin.radu@valinet.ro>
Date: Wed, 6 Oct 2021 02:50:09 +0300
Subject: [PATCH] GetProcAddress for some stuff from uxtheme

---
 ExplorerPatcher/dllmain.c | 22 +++++++++++++++++++--
 ExplorerPatcher/utility.h | 41 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+), 2 deletions(-)

diff --git a/ExplorerPatcher/dllmain.c b/ExplorerPatcher/dllmain.c
index 4b6c759..dc695e1 100644
--- a/ExplorerPatcher/dllmain.c
+++ b/ExplorerPatcher/dllmain.c
@@ -67,6 +67,16 @@ static HWND(WINAPI* CreateWindowInBand)(
     _In_opt_ LPVOID lpParam,
     DWORD band
     );
+
+static void(*SetPreferredAppMode)(INT64 bAllowDark);
+
+static void(*AllowDarkModeForWindow)(HWND hWnd, INT64 bAllowDark);
+
+static BOOL(*ShouldAppsUseDarkMode)();
+
+static void(*GetThemeName)(void*, void*, void*);
+
+static BOOL AppsShouldUseDarkMode() { return TRUE; }
 #pragma endregion
 
 
@@ -622,7 +632,7 @@ HWND WINAPI explorerframe_SHCreateWorkerWindowHook(
         if (hStartIsBack64 && bMicaEffectOnTitlebar)
         {
             BOOL value = TRUE;
-            DwmSetWindowAttribute(hWndParent, 1029, &value, sizeof(BOOL)); // Set Mica effect on title bar
+            DwmSetWindowAttribute(hWndParent, DWMWA_MICA_EFFFECT, &value, sizeof(BOOL)); // Set Mica effect on title bar
             SetWindowSubclass(
                 result, 
                 (uintptr_t)hStartIsBack64 + SB_MICA_EFFECT_SUBCLASS_OFFSET, 
@@ -1338,10 +1348,18 @@ __declspec(dllexport) DWORD WINAPI main(
 
 
         HANDLE hUser32 = LoadLibraryW(L"user32.dll");
-        if (hUser32) CreateWindowInBand = GetProcAddress(hUser32, "CreateWindowInBand");
+        CreateWindowInBand = GetProcAddress(hUser32, "CreateWindowInBand");
         printf("Setup user32 functions done\n");
 
 
+        HANDLE hUxtheme = LoadLibraryW(L"uxtheme.dll");
+        SetPreferredAppMode = GetProcAddress(hUxtheme, (LPCSTR)0x87);
+        AllowDarkModeForWindow = GetProcAddress(hUxtheme, (LPCSTR)0x85);
+        ShouldAppsUseDarkMode = GetProcAddress(hUxtheme, (LPCSTR)0x84);
+        GetThemeName = GetProcAddress(hUxtheme, (LPCSTR)0x4A);
+        printf("Setup uxtheme functions done\n");
+
+
         HANDLE hTwinuiPcshell = LoadLibraryW(L"twinui.pcshell.dll");
 
         CImmersiveContextMenuOwnerDrawHelper_s_ContextMenuWndProcFunc = (INT64(*)(HWND, int, HWND, int, BOOL*))
diff --git a/ExplorerPatcher/utility.h b/ExplorerPatcher/utility.h
index 9fd0411..d02b74f 100644
--- a/ExplorerPatcher/utility.h
+++ b/ExplorerPatcher/utility.h
@@ -3,6 +3,9 @@
 #include <Windows.h>
 #include <tchar.h>
 #include <windows.data.xml.dom.h>
+#include <accctrl.h>
+#include <aclapi.h>
+#include <sddl.h>
 #include <Shlobj_core.h>
 #define _LIBVALINET_INCLUDE_UNIVERSAL
 #include <valinet/universal/toast/toast.h>
@@ -12,6 +15,44 @@
 #define SPECIAL_FOLDER CSIDL_APPDATA
 #define APP_RELATIVE_PATH "\\ExplorerPatcher"
 
+// This allows compiling with older Windows SDKs as well
+#ifndef DWMWA_USE_HOSTBACKDROPBRUSH
+#define DWMWA_USE_HOSTBACKDROPBRUSH 17            // [set] BOOL, Allows the use of host backdrop brushes for the window.
+#endif
+#ifndef DWMWA_USE_IMMERSIVE_DARK_MODE
+#define DWMWA_USE_IMMERSIVE_DARK_MODE 20          // [set] BOOL, Allows a window to either use the accent color, or dark, according to the user Color Mode preferences.
+#endif
+#ifndef DWMWCP_DEFAULT
+#define DWMWCP_DEFAULT 0
+#endif
+#ifndef DWMWCP_DONOTROUND
+#define DWMWCP_DONOTROUND 1
+#endif
+#ifndef DWMWCP_ROUND
+#define DWMWCP_ROUND 2
+#endif
+#ifndef DWMWCP_ROUNDSMALL
+#define DWMWCP_ROUNDSMALL 3
+#endif
+#ifndef DWMWA_WINDOW_CORNER_PREFERENCE
+#define DWMWA_WINDOW_CORNER_PREFERENCE 33         // [set] WINDOW_CORNER_PREFERENCE, Controls the policy that rounds top-level window corners
+#endif
+#ifndef DWMWA_BORDER_COLOR
+#define DWMWA_BORDER_COLOR 34                     // [set] COLORREF, The color of the thin border around a top-level window
+#endif
+#ifndef DWMWA_CAPTION_COLOR
+#define DWMWA_CAPTION_COLOR 35                    // [set] COLORREF, The color of the caption
+#endif
+#ifndef DWMWA_TEXT_COLOR
+#define DWMWA_TEXT_COLOR 36                       // [set] COLORREF, The color of the caption text
+#endif
+#ifndef DWMWA_VISIBLE_FRAME_BORDER_THICKNESS
+#define DWMWA_VISIBLE_FRAME_BORDER_THICKNESS 37   // [get] UINT, width of the visible border around a thick frame window
+#endif
+#ifndef DWMWA_MICA_EFFFECT
+#define DWMWA_MICA_EFFFECT 1029
+#endif
+
 #pragma region "Weird stuff"
 INT64 nimpl4_1(INT64 a1, DWORD* a2);
 INT64 nimpl4_0(INT64 a1, DWORD* a2);