Tag Archives: C5_FOPEN

FT_COM3OR4

Posted on by vivaclipper 
FT_COM3OR4()
 Enable use of COM3 and/or COM4 on IBM/PC compatibles.

 Syntax

      FT_COM3OR4( <nPort> ) -> lSuccess

 Arguments

     <nPort> is the COM port to enable.  Ports except 3 and 4 are ignored.
     The default is 3.

 Returns

     a logical indicating success or failure of the operation.

 Description

     FT_COM3OR4() uses FT_POKE() to write to memory the correct data
     to enable COM3 or COM4 on IBM-PC compatables.  The programmer will
     still need to explicitly open the port with SET PRINTER or FOPEN()
     to send data out the port.

     FT_COM3OR4() owes everything to FT_POKE().

 Examples

     // attempt to enable COM3
     IF FT_COM3OR4( 3 )
        Qout("COM3 was enabled")
     END

 Source: COM34.PRG

FT_TEMPFIL

Posted on by vivaclipper 
FT_TEMPFIL()
 Create a file with a unique name

 Syntax

      FT_TEMPFIL( [ <cPath> ] [, <lHide> ] ) -> cFileSpec

 Arguments

     <cPath> is the directory where you want to create the temporary
     file.  If you omit this argument, the root of the current drive
     is assumed ("\").

     If <lHide> is .T., then the file will be created with the hidden
     attribute set.  The default is .F.

 Returns

     <cFileSpec> should be your path, including the name of the newly
     created unique file.  Use this with FOPEN(), etc.

     If a DOS error occurred when trying to create the file, a
     null string will be returned.

 Description

     This function uses DOS Interrupt 21, service 5Ah (Create temporary
     file) to create a unique filename in a directory you specify.
     There will be no extension.  After the file is created, you may
     then fopen() it and do any i/o you need (see the test driver
     in the source code).

     This function requires FT_INT86().

 Examples

     Create a unique file in the root of the current drive:

            myFile := FT_TEMPFIL()

     Create a unique file in the current directory and hide it:

            myFile := FT_TEMPFIL(".\", .t.)

     Create a unique file on another drive, but do not hide it:

            myFile := FT_TEMPFIL("e:\nanfor\src\")

 Source: TEMPFILE.PRG

 Author: Glenn Scott