Base version of ncurses-5.7 library
diff --git a/form/frm_sub.c b/form/frm_sub.c
new file mode 100644
index 0000000..6db0023
--- /dev/null
+++ b/form/frm_sub.c
@@ -0,0 +1,77 @@
+/****************************************************************************
+ * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc.              *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *   Author:  Juergen Pfeifer, 1995,1997                                    *
+ ****************************************************************************/
+
+#include "form.priv.h"
+
+MODULE_ID("$Id: frm_sub.c,v 1.9 2004/12/11 22:13:39 tom Exp $")
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform  
+|   Function      :  int set_form_sub(FORM *form, WINDOW *win)
+|   
+|   Description   :  Set the subwindow of the form to win. 
+|
+|   Return Values :  E_OK       - success
+|                    E_POSTED   - form is posted
++--------------------------------------------------------------------------*/
+NCURSES_EXPORT(int)
+set_form_sub(FORM *form, WINDOW *win)
+{
+  T((T_CALLED("set_form_sub(%p,%p)"), form, win));
+
+  if (form && (form->status & _POSTED))
+    RETURN(E_POSTED);
+
+  Normalize_Form(form)->sub = win;
+  RETURN(E_OK);
+}
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform  
+|   Function      :  WINDOW *form_sub(const FORM *)
+|   
+|   Description   :  Retrieve the window of the form.
+|
+|   Return Values :  The pointer to the Subwindow.
++--------------------------------------------------------------------------*/
+NCURSES_EXPORT(WINDOW *)
+form_sub(const FORM *form)
+{
+  const FORM *f;
+
+  T((T_CALLED("form_sub(%p)"), form));
+
+  f = Normalize_Form(form);
+  returnWin(Get_Form_Window(f));
+}
+
+/* frm_sub.c ends here */