# filelock

Locks the specified file. (version 4.74 or later)

    filelock <file handle> [<timeout>]

## Remarks

Locks the specified whole file for exclusive access by the calling process.
The <timeout> argument is described below.

<timeout> | Description
0 | Returns quickly the error when the file is already locked.
Abbreviation | Returns only when the file is unlocked.
Value | Waits until the file is unlocked or the time-out interval(in seconds) elapses. Returns the error when the time-out interval elapsed.

If the function succeeds, the system variable "result" is set to 0.
If the function fails, the system variable "result" is set to 1.

## Examples

    fileopen fhandle 'test.txt' 0
    filelock fhandle
    if result!=0 then
    	messagebox 'error' 'hoge'
    endif
    filewrite fhandle 'sample'
    pause 60
    fileunlock fhandle
    if result!=0 then
    	messagebox 'error' 'hoge'
    endif
    fileclose fhandle

## See also

- fileunlock