远程控制正在运行的应用程序 C++ WINAPI

Question

我想创建一个可以控制指定运行进程的窗口的应用程序。我使用 WINAPI 获取所需应用程序的主窗口句柄，并通过 WINAPI 的 SendMessage 函数向其发送消息。但应用程序似乎没有对消息做出反应。这是我的代码：

#include <Windows.h>


struct handle_res {
    HWND hwnd;
    DWORD pid;
};

HWND vscode_hwnd;
DWORD vscode_thread_id;

BOOL CALLBACK enum_wnd_proc(HWND hwnd, LPARAM lparam)
{
    handle_res* p = reinterpret_cast<handle_res*>(lparam);
    DWORD pid{};
    if (GetWindowThreadProcessId(hwnd, &pid)) {
        if (p->pid == pid) {
            p->hwnd = hwnd;
            SetLastError(-1);
            return FALSE;
        }
    }
    return TRUE;
}

LRESULT CALLBACK wnd_proc(
    HWND hwnd,
    UINT msg,
    WPARAM wparam,
    LPARAM lparam
)
{
    SendMessageA(vscode_hwnd, msg, wparam, lparam);
    switch (msg) {
    case WM_DESTROY: { PostQuitMessage(0); } break;     
    default: return DefWindowProcA(hwnd, msg, wparam, lparam); break;
    }
    return 0;
}

int WinMain(
    HINSTANCE hInstance,
    HINSTANCE hPrevInstance,
    LPSTR lpCmdLine,
    int nCmdShow
)
{
    // obtain the window handle of the vscode
    STARTUPINFOA supinfo{};
    PROCESS_INFORMATION procinfo{};
    CreateProcessA(
        "C:\\vscode\\code.exe",
        NULL, NULL, NULL, FALSE,
        NORMAL_PRIORITY_CLASS,
        NULL, NULL, 
        &supinfo, &procinfo
    );

    handle_res res{};
    res.pid = procinfo.dwProcessId;
    EnumWindows(enum_wnd_proc, reinterpret_cast<LPARAM>(& res));
    vscode_hwnd = res.hwnd;
    vscode_thread_id = res.pid;
    
    // creating window for this application
    // to get messages and redirect them to the
    // obtained vscode window handle
    WNDCLASSA wndcls{};
    wndcls.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
    wndcls.lpfnWndProc = wnd_proc;
    wndcls.hInstance = hInstance;
    wndcls.lpszClassName = "Window";

    if (!RegisterClassA(&wndcls)) {
        return -1;
    }

    HWND winh = CreateWindowA(
        "Window", "MyWindow", 
        WS_OVERLAPPEDWINDOW, 
        0, 0, 800, 600, 
        NULL, NULL, 
        hInstance, NULL
    );

    if (!winh) {
        return -1;
    }

    ShowWindow(winh, nCmdShow);
    MSG msg;
    while (GetMessageA(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessageA(&msg);
    }
    CloseHandle(procinfo.hProcess);
    CloseHandle(procinfo.hThread);
    return 0;
}

我应该怎么做才能使正在运行的应用程序对消息做出反应？