lIsDir( cDir )-> <lExist>
------------------------------------------------------------------------------


 PARAMETER:

  <cDir>      Is the directory to be tested


 RETURNS:

  <lExist> is TRUE if the given directory exists


 DESCRIPTION:

  IsDir() checks, if the given directory really exists.


 EXAMPLE:


    +--------------------------------------------------------------+
    |  /* check work directory */                                  |
    |   IF ! IsDir( "c:\ide\projects" )                            |
    |      MsgStop( "Please complete the Installation" )           |
    |   ENDIF                                                      |
    +--------------------------------------------------------------+


 SOURCE:  

  SOURCE\FUNCTION\FILENAME.PRG