NoSteamWebHelper

Build.cmd

@echo off
cd "%~dp0"
gcc -municode -mwindows -nostdlib -Os -s WinMain.c -lUser32 -lKernel32 -lShell32 -o NoSteamWebHelper.exe
upx --best --ultra-brute NoSteamWebHelper.exe>nul 2>&1

WinMain.c

#include <windows.h>
#include <tlhelp32.h>

LRESULT WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    static NOTIFYICONDATAW Data = {.cbSize = sizeof(NOTIFYICONDATAW),
                                   .uCallbackMessage = WM_USER,
                                   .uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP,
                                   .szTip = L"NoSteamWebHelper"};
    static UINT TaskbarCreated = WM_NULL;

    switch (uMsg)
    {
    case WM_CREATE: {
        TaskbarCreated = RegisterWindowMessageW(L"TaskbarCreated");
        Data.hWnd = hWnd;
        Data.hIcon = LoadIconW(NULL, IDI_APPLICATION);
        Shell_NotifyIconW(NIM_ADD, &Data);
        break;
    }

    case WM_USER: {
        if (lParam == WM_RBUTTONDOWN)
        {
            POINT Point = {};
            HMENU hMenu = NULL;
            SetForegroundWindow(hWnd);
            GetCursorPos(&Point);
            hMenu = CreatePopupMenu();
            AppendMenuW(hMenu, MF_STRING, 1, L"On");
            AppendMenuW(hMenu, MF_STRING, 2, L"Off");
            AppendMenuW(hMenu, MF_STRING, 3, L"Exit");
            TrackPopupMenu(hMenu, TPM_LEFTALIGN | TPM_LEFTBUTTON, Point.x, Point.y, 0, hWnd, NULL);
        }
        break;
    }

    case WM_COMMAND: {
        HANDLE hThread = OpenThread(THREAD_SUSPEND_RESUME, FALSE,
                                    GetWindowThreadProcessId(FindWindowW(L"vguiPopupWindow", L"Untitled"), NULL));
        switch (wParam)
        {
        case 2: {
            HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
            PROCESSENTRY32W pe = {.dwSize = sizeof(PROCESSENTRY32W)};
            if (Process32FirstW(hSnapshot, &pe))
                do
                    if (CompareStringOrdinal(L"steamwebhelper.exe", -1, pe.szExeFile, -1, TRUE) == CSTR_EQUAL)
                    {
                        HANDLE hProcess = OpenProcess(PROCESS_TERMINATE, FALSE, pe.th32ProcessID);
                        TerminateProcess(hProcess, 0);
                        CloseHandle(hProcess);
                    }
                while (Process32NextW(hSnapshot, &pe));
            CloseHandle(hSnapshot);
            SuspendThread(hThread);
            break;
        }
        case 1:
        case 3: {
            ResumeThread(hThread);
            if (wParam == 3)
            {
                CloseHandle(hThread);
                Shell_NotifyIconW(NIM_DELETE, &Data);
                PostQuitMessage(0);
            }
            break;
        }
        }
        CloseHandle(hThread);
        break;
    }

    default:
        if (uMsg == TaskbarCreated)
            Shell_NotifyIconW(NIM_ADD, &Data);
        break;
    }

    return DefWindowProcW(hWnd, uMsg, wParam, lParam);
}

int WinMainCRTStartup()
{
    HINSTANCE hInstance = GetModuleHandleW(NULL);
    if (!RegisterClassW(
            &((WNDCLASSW){.lpszClassName = L"NoSteamWebHelper", .hInstance = hInstance, .lpfnWndProc = WndProc})) ||
        !CreateWindowExW(WS_EX_LEFT | WS_EX_LTRREADING, L"NoSteamWebHelper", NULL, WS_OVERLAPPED, 0, 0, 0, 0, NULL,
                         NULL, hInstance, 0))
        ExitProcess(1);

    MSG msg = {};
    while (GetMessageW(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessageW(&msg);
    }

    ExitProcess(0);
    return 0;
}