Thread: using GetKeyAsyncState

I'm trying to learn how GetAsyncKeyState works. With this code when escape is pressed it's suppose to break out of the loop, but it doesn't. Why not? In a GUI App would I put this in my message loop?

Code:

#include <windows.h>
#include <stdio.h>

int main(void)
{
   while(1)
   {
      if(GetAsyncKeyState(VK_ESCAPE))
      {
         break;
      }
   }
   return 0;
}