import com.ms.dll.Callback;

public class EnumWins {

public static void main(String args[]) {
 boolean results = false;
 EnumWindowsProc mycallback = new EnumWindowsProc() ;
 results = EnumWindows(mycallback, 0) ;
 if( ! results )
  System.out.println("Problem enumerating windows") ;
}

    /** @dll.import("USER32") */
    private static native boolean EnumWindows(EnumWindowsProc myproc, int param);
}



class EnumWindowsProc extends Callback {
    public boolean callback(int hwnd, int lparam) {
      StringBuffer text = new StringBuffer(50);
      GetWindowText(hwnd, text, text.capacity()+1);
   
      if (text.length() != 0) {
        System.out.println("hwnd = " + 
                           Integer.toHexString(hwnd) +
                           "h:  Text = " + text);
      } 
      return true;  // return TRUE to continue enumeration.
    }
  
  /** @dll.import("USER32") */
  private static native int GetWindowText(int hwnd, 
                                   StringBuffer text, int cch);
}