Tag Archives: FILESFREE

CT_FILESFREE

Posted on by vivaclipper 
 FILESFREE()
 Specifies the number of files you can open
------------------------------------------------------------------------------
 Syntax

     FILESFREE() --> nFreeHandles

 Returns

     FILESFREE() returns the number of available handles.

 Description

     This function returns the number of available handles that correspond to
     the number of files you can open.  This enables you to avoid DOS error
     4.

 Note

     .  Immediately after you start a Clipper application, a value
        -- smaller than that of FILESMAX() -- is returned.  This happens
        because the operating system and application itself is already using
        handles.

 Examples

     .  Can I still open a file?

        IF FILESFREE() > 0                // At least 1 handle free?
           USE CUSTOMER                   // Open a file
        ENDIF

     .  Be careful when you open multiple indexes at the same time!

        IF FILESFREE() > 1                // At least 2 handles free?
           USE CUSTOMER INDEX CUSTNR      // Open 2 files
        ENDIF

See Also: FILESMAX()

 

Tools – System Information

Posted on by vivaclipper 
Introduction System Information
BIOSDATE()   Determines the system BIOS date
BOOTCOLD()   Triggers a cold boot
BOOTWARM()   Triggers a warm start of the system
CPUTYPE()    Determines what type of microprocessor in use
DOSPARAM()   Retrieves the DOS command line as a string
ENVPARAM()   Reads the entire DOS environment table into a string
ERRORACT()   Recommends action for a DOS error that has occurred previously
ERRORBASE()  Source of the most-recent DOS error
ERRORCODE()  Identifies a DOS error that has occurred previously
ERRORORG()   Origin of the most-recent DOS error
EXENAME()    Returns name and directory of the current Clipper program
FILESFREE()  Specifies the number of files you can open
FILESMAX()   Specifies maximum number of files that can be open at one time
GETCOUNTRY() Queries country setting for the operating system
ISANSI()     Tests to see if the ANSI screen driver is installed
ISAT()       Determines if a program is running on an AT
ISMATH()     Determines if a math coprocessor is installed
MEMSIZE()    Determines size of conventional or extended memory
NUMBUFFERS() Determines the BUFFERS= setting
NUMFILES()   Determines maximum number of files you can open simultaneously
OSVER()      Returns the DOS version number
PCTYPE()     Returns the type of computer in use
SSETBREAK()  Sets and checks the DOS BREAK switch
SSETVERIFY() Sets and checks the DOS VERIFY switch