WindhawkMods/classic-theme-windows.wh.cpp

// ==WindhawkMod==
// @id              classic-theme-windows
// @name            Classic Theme Windows
// @description     Forces Classic Theme on all Windows
// @version         0.1
// @author          Travis, Cynosphere
// @include         *
// @exclude         wininit.exe
// @exclude         winlogon.exe
// @exclude         taskmgr.exe
// @exclude         dwm.exe
// @exclude         C:\Windows\System32\*.scr
// @exclude         svchost.exe
// @exclude         taskhostw.exe
// @exclude         dllhost.exe
// @exclude         conhost.exe
// @exclude         sihost.exe
// @exclude         lsass.exe
// @exclude         C:\Program Files (x86)\Steam\*
// @exclude         Code.exe
// @exclude         Code - Insiders.exe
// @exclude         msedge.exe
// @exclude         vmware.exe
// @exclude         vmware-vmx.exe
// @exclude         rundll32.exe
// @exclude         Spotify.exe
// @exclude         smartscreen.exe
// @exclude         RuntimeBroker.exe
// @exclude         ApplicationFrameHost.exe
// @exclude         SystemSettings.exe
// @exclude         SecHealthUI.exe
// @exclude         SecurityHealthHost.exe
// @exclude         PhoneExperienceHost.exe
// @exclude         SecurityHealthTray.exe
// @exclude         Window Detective.exe
// @compilerOptions -luxtheme -ldwmapi
// ==/WindhawkMod==

// ==WindhawkModReadme==
/*
# Classic Theme Windows
Forces Classic Theme on all Windows
*/
// ==/WindhawkModReadme==

#include <windows.h>
#include <uxtheme.h>
#include <dwmapi.h>

static const int DisableDWM = DWMNCRP_DISABLED;
static const int EnableDWM = DWMNCRP_ENABLED;

void BasicThemerEnable(HWND hwnd) {
    DwmSetWindowAttribute(hwnd, DWMWA_NCRENDERING_POLICY, &DisableDWM, sizeof(int));
}
void BasicThemerDisable(HWND hwnd) {
    DwmSetWindowAttribute(hwnd, DWMWA_NCRENDERING_POLICY, &EnableDWM, sizeof(int));
}

using CreateWindowExW_t = decltype(&CreateWindowExW);
CreateWindowExW_t CreateWindowExW_Orig;
HWND WINAPI CreateWindowExW_Hook(DWORD dwExStyle,LPCWSTR lpClassName,LPCWSTR lpWindowName,DWORD dwStyle,int X,int Y,int nWidth,int nHeight,HWND hWndParent,HMENU hMenu,HINSTANCE hInstance,LPVOID lpParam) {
    HWND res = CreateWindowExW_Orig(dwExStyle,lpClassName,lpWindowName,dwStyle,X,Y,nWidth,nHeight,hWndParent,hMenu,hInstance,lpParam);

    BasicThemerEnable(res);

    return res;
}
using CreateWindowExA_t = decltype(&CreateWindowExA);
CreateWindowExA_t CreateWindowExA_Orig;
HWND WINAPI CreateWindowExA_Hook(DWORD dwExStyle,LPCSTR lpClassName,LPCSTR lpWindowName,DWORD dwStyle,int X,int Y,int nWidth,int nHeight,HWND hWndParent,HMENU hMenu,HINSTANCE hInstance,LPVOID lpParam) {
    HWND res = CreateWindowExA_Orig(dwExStyle,lpClassName,lpWindowName,dwStyle,X,Y,nWidth,nHeight,hWndParent,hMenu,hInstance,lpParam);

    BasicThemerEnable(res);

    return res;
}

BOOL CALLBACK EnableBasicThemerForAll(HWND hWnd, LPARAM lParam) {
    BasicThemerEnable(hWnd);

    return TRUE;
}
BOOL CALLBACK DisableBasicThemerForAll(HWND hWnd, LPARAM lParam) {
    BasicThemerDisable(hWnd);

    return TRUE;
}

BOOL Wh_ModInit() {
    //Wh_Log(L"Init");

    //Wh_Log(L"Theme properties were: 0x%x", GetThemeAppProperties());
    SetThemeAppProperties(0);
    //Wh_Log(L"Theme properties are: 0x%x", GetThemeAppProperties());

    Wh_SetFunctionHook((void*)CreateWindowExW,
                       (void*)CreateWindowExW_Hook,
                       (void**)&CreateWindowExW_Orig);
    Wh_SetFunctionHook((void*)CreateWindowExA,
                       (void*)CreateWindowExA_Hook,
                       (void**)&CreateWindowExA_Orig);

    DWORD thisPid = GetProcessIdOfThread(GetCurrentThread());
    EnumWindows(EnableBasicThemerForAll, thisPid);

    return TRUE;
}

void Wh_ModUninit() {
    //Wh_Log(L"Uninit");

    //Wh_Log(L"Theme properties were: 0x%x", GetThemeAppProperties());
    if (GetThemeAppProperties() == 0) {
        SetThemeAppProperties(3);
    }
    //Wh_Log(L"Theme properties are: 0x%x", GetThemeAppProperties());

    DWORD thisPid = GetProcessIdOfThread(GetCurrentThread());
    EnumWindows(DisableBasicThemerForAll, thisPid);
}