按CTRL-ALT-Q，自动点击鼠标下窗口的相对坐标，间隔200ms。再次按CTRL-ALT-Q停止。https://enza.fun/game/1?code=f85c45f2-c7c7-4e7c-a17a-eb282c7c5f78&openExternalBrowser=1

AutoClick.cpp

#include <Windows.h>
#include <math.h>
#include <stdio.h>

void ErrorExit(const char *pszWhat) {
    auto dwError = GetLastError();
    char *pBuf;
    FormatMessageA(
        FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
        nullptr, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR) &pBuf, 0, nullptr
    );
    fprintf(stderr, "%s failed: %s\n", pszWhat, pBuf);
    LocalFree(pBuf);
    fprintf(stderr, "Press Enter to exit...");
    getchar();
    ExitProcess(dwError);
}

int main() {
    if (!RegisterHotKey(nullptr, 0, MOD_CONTROL | MOD_ALT, 'Q'))
        ErrorExit("RegisterHotKey");
    bool bActive = false;
    UINT_PTR uTimer {};
    MSG vMsg {};
    HWND hWndActive {};
    POINT vPointActive {};
    while (GetMessageA(&vMsg, nullptr, 0, 0)) {
        switch (vMsg.message) {
        case WM_HOTKEY: {
            if (bActive) {
                if (!KillTimer(nullptr, uTimer))
                    ErrorExit("KillTimer");
                printf("Stopped\n");
                bActive = false;
                break;
            }
            struct Info {
                HWND hWnd;
                RECT vRect;
                POINT vPoint;
                double dDist;
            } vInfo {nullptr, {}, {}, 0.0};
            if (!GetCursorPos(&vInfo.vPoint))
                ErrorExit("GetCursorPos");
            auto hWnd = WindowFromPoint(vInfo.vPoint);
            EnumChildWindows(hWnd, [] (HWND hWnd, LPARAM lPar) -> BOOL {
                auto pInfo = (Info *) lPar;
                if (!IsWindowVisible(hWnd)/* || !IsWindowEnabled(hWnd)*/)
                    return TRUE;
                RECT vRect;
                if (!GetWindowRect(hWnd, &vRect))
                    return TRUE;
                auto &vPoint = pInfo->vPoint;
                if (vPoint.x < vRect.left || vPoint.x > vRect.right)
                    return TRUE;
                if (vPoint.y < vRect.top || vPoint.y > vRect.bottom)
                    return TRUE;
                auto dX = (double) (vRect.left + vRect.right) / 2.0;
                auto dY = (double) (vRect.top + vRect.bottom) / 2.0;
                auto dDist = hypot(dX - vPoint.x, dY - vPoint.y);
                bool bUpdate = !pInfo->hWnd;
                if (!bUpdate) {
                    bUpdate = true;
                    bUpdate &= vRect.left >= pInfo->vRect.left && vRect.right <= pInfo->vRect.right;
                    bUpdate &= vRect.top >= pInfo->vRect.top && vRect.bottom <= pInfo->vRect.bottom;
                    if (!bUpdate) {
                        bUpdate |= vRect.left > pInfo->vRect.left || vRect.right < pInfo->vRect.right;
                        bUpdate |= vRect.top > pInfo->vRect.top || vRect.bottom < pInfo->vRect.bottom;
                        bUpdate &= dDist < pInfo->dDist;
                    }
                }
                if (bUpdate) {
                    pInfo->hWnd = hWnd;
                    pInfo->vRect = vRect;
                    pInfo->dDist = dDist;
                }
                return TRUE;
            }, (LPARAM) &vInfo);
            hWndActive = vInfo.hWnd ? vInfo.hWnd : hWnd;
            vPointActive = vInfo.vPoint;
            char aBuf[4096];
            GetWindowTextA(hWndActive, aBuf, 4096);
            if (!ScreenToClient(hWndActive, &vPointActive))
                ErrorExit("ScreenToClient");
            uTimer = SetTimer(nullptr, 0, 200, nullptr);
            if (!uTimer)
                ErrorExit("SetTimer");
            printf("Started [%p] [%s]: x = %ld, y = %ld\n", (void *) hWndActive, aBuf, vPointActive.x, vPointActive.y);
            bActive = true;
            break;
        }
        case WM_TIMER: {
            if (!PostMessageA(hWndActive, WM_LBUTTONDOWN, MK_LBUTTON, MAKELPARAM(vPointActive.x, vPointActive.y)))
                ErrorExit("PostMessage WM_LBUTTONDOWN");
            if (!PostMessageA(hWndActive, WM_LBUTTONUP, MK_LBUTTON, MAKELPARAM(vPointActive.x, vPointActive.y)))
                ErrorExit("PostMessage WM_LBUTTONUP");
            break;
        }
        }
    }
    return 0;
}