//virus.cpp
#include <windows.h>
//#include <string>
int main(int argc, char *argv[]){
HKEY hkey;
char szBuf[] = "C:\\Windows\\notepad.exe";
RegOpenKeyEx(HKEY_LOCAL_MACHINE, "Software\\Microsoft\\Windows\\Currentversion\\Run", 0, KEY_SET_VALUE, &hkey);
RegSetValueEx (hkey, "notepad.exe", 0, REG_SZ, (LPBYTE) szBuf, strlen(szBuf) + 1);
RegCloseKey(hkey);
MessageBox(NULL,"Notepad added to startup...","Info",MB_OK);
return 0;
}