.. highlightlang:: us

.. index:: FE_SetFormulaDirectory

.. _fe_setformuladirectory:

FE_SetFormulaDirectory
======================

.. us.tag  FE_SetFormulaDirectory New411 ENGLISH formula

The function :ref:`FE_SetFormulaDirectory` sets the formula directory. The
function unloads the old formulas and loads the new formulas.The function can be
invoked in :ref:`OnFormulaStartEval`.

.. function::  svOldDir = FE_SetFormulaDirectory(svDir)

.. us.return

**Return Value**

*svOldDir* is a string vector containing the old formula directory.

.. us.params

**Parameters**

.. uparam:: svDir

   *svDir* is a string vector with the new Formula directory. The function
   concatenates the vector elements by adding a semicolon (;).

.. us.example

**Example**

The function :ref:`OnFormulaStartEval` is invoked when the user starts a formula
evaluation, e.g. by pressing the :kbd:`F9` key. In the following example the
directory is set depending of the value of *ssCreator* in the NC file.

 ::

   def OnFormulaStartEval(ncid)
   {
       if (nc_attinq_datatype(ncid, NC_GLOBAL, "Creator") == NC_CHAR) {
           ssCreator = nc_attget(ncid, NC_GLOBAL, "Creator");
           if (strmatch("*Pasy*", ssCreator)) {
               FE_SetFormulaDirectory("c:/formel1_pasy; C:/formel2_pasy");
               return TRUE; 
           } else {
               ssPath = GetProfileString("Formula", ssCreator, "c:/myformula.ini")
               if (ssPath != "") {
                   FE_SetFormulaDirectory(ssPath);
               }
           }
       }
       return TRUE;
   }

.. seealso::
   :ref:`formula-interpreter`,
   :ref:`onformulastarteval`,
   :ref:`FE_GetFormulaDirectory`

:sub:`id-1555923`