#include <stdlib.h>
#include <string.h>
#include <windows.h>

LRESULT dummy(HWND h, UINT u, WPARAM w, LPARAM l)
{
}

int WinMain(HINSTANCE h, HINSTANCE h1, LPSTR ss, int cc)
{
  char s[256];
  struct WNDCLASSEX c;
  memset(&c, 0, sizeof(c));
  c.cbSize = sizeof(struct WNDCLASSEX);
  c.hInstance = h;
  c.lpfnWndProc = &dummy;
  c.lpszClassName = &s;

  while(1)
  {
     for(int i = 0; i < sizeof(s); i++)
     {
       s[i] = 'A' + rand() % ('Z' - 'A');
     }
     RegisterClassEx(&c);
  }
  return 0;
}