(import 
  (org.eclipse.swt.internal.win32 OS)
  (org.eclipse.swt.internal.win32 TCHAR))
 
(def lpText
  (TCHAR. 0 "Hello, Win32 API World!" true))

(def lpCaption 
  (TCHAR. 0 "Hello, World" true))

(. OS (MessageBox 0 lpText lpCaption OS/MB_OK))