Leica tps1100, Руководство пользователя, Страница: 278 / 1154

GeoBASIC Reference Manual 2.GeoBasic Constructs
TPS1100-Version 1.30 2-49
Declaration Open( byVal sFileName AS FileName,
byVal sMode AS String20,
FileId AS FileId,
byVal iRecLen AS Integer )
Remarks The Function attempts to open the file given in
sFileName
with
mode sMode . If the procedure is successful a valid file descriptor
is returned. This file descriptor is used for all successive
operations on the opened file. The device of the PC-Card, which is
also the default device, is
"A:"
. An Open will not change the
default device nor the default directory.
Directories included in
sFileName
must exist already. The
FileId
will be determined automatically. There is no need at all
to handle the value of
FileId
directly! No white spaces
(spaces, tabs, etc.) may be included in
sFileName.
Note If the device is not mounted, an error code will be
returned.
The iRecLen parameter will be ignored, hence it has no
effect at all. Its usage is reserved for future purposes.
Access modes may not be mixed, hence opening for
Input
and
Output
does not work. A maximum of 20
files can be opened simultaneously.
Parameters
sFileName in
File path and name of the file to be
opened
(
"A:\\dir\\filename.ext"
, up
to 100 characters).
sMode in
Access mode
−
"Input" - Opens a text file for
reading. The file must exist.
−
"Output"
- Creates a text new file
for writing or truncates it to zero if it