SWT 设置窗体透明和最上

//设置最上  
OS.SetWindowPos(shell.handle, OS.HWND_TOPMOST, 0, 10, 300, 300,
    SWT.NULL);

//设置透明窗体
  OS.SetWindowLong(shell.handle, OS.GWL_EXSTYLE, OS.GetWindowLong(
    shell.handle, OS.GWL_EXSTYLE) ^ 0x80000);

  TCHAR lpLibFileName = new TCHAR(0, "User32.dll", true);
  int hInst = OS.LoadLibrary(lpLibFileName);
  if (hInst != 0) {
   String name = "SetLayeredWindowAttributes/0";
   byte[] lpProcName = new byte[name.length()];
   for (int i = 0; i < lpProcName.length; i++) {
    lpProcName[i] = (byte) name.charAt(i);
   }
   int fun = OS.GetProcAddress(hInst, lpProcName);
   if (fun != 0) {
    OS.CallWindowProc(fun, shell.handle, 0, 200, 2);
   }
   OS.FreeLibrary(hInst);
  }