UNLOCK: Difference between revisions
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(Created page with "The {{KW|UNLOCK}} statement opens access to parts or all of a file to other programs and network users. {{PageSyntax}} :<code>{{KW|UNLOCK}} [#]{{Parameter|fileNumber%}}</code> :<code>{{KW|UNLOCK}} [#]{{Parameter|fileNumber%}}, {{Parameter|record&}}</code> :<code>{{KW|UNLOCK}} [#]{{Parameter|fileNumber%}}, [{{Parameter|firstRecord&}}] TO {{Parameter|lastRecord&}}</code> {{PageDescription}} * {{Parameter|fileNumber%}} is the file number of the file to unlock. * In the...") |
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This statement opens access to parts or all of a file to other programs and network users. | |||
{{PageSyntax}} | {{PageSyntax}} | ||
: | : [[UNLOCK]] [#]{{Parameter|fileNumber%}} | ||
: | : [[UNLOCK]] [#]{{Parameter|fileNumber%}}, {{Parameter|record&}} | ||
: | : [[UNLOCK]] [#]{{Parameter|fileNumber%}}, [{{Parameter|firstRecord&}}] TO {{Parameter|lastRecord&}} | ||
| Line 14: | Line 14: | ||
* In the third syntax, the records or bytes in the range [{{Parameter|firstRecord&}},{{Parameter|lastRecord&}}] are unlocked. If {{Parameter|firstRecord&}} is omitted, it is assumed to be the first record or byte. | * In the third syntax, the records or bytes in the range [{{Parameter|firstRecord&}},{{Parameter|lastRecord&}}] are unlocked. If {{Parameter|firstRecord&}} is omitted, it is assumed to be the first record or byte. | ||
* For files opened in [[BINARY]] mode, each record corresponds to a single byte. | * For files opened in [[BINARY]] mode, each record corresponds to a single byte. | ||
* [[LOCK]] and UNLOCK statements are always used in pairs and each statement must match the other one. | * [[LOCK]] and [[UNLOCK]] statements are always used in pairs and each statement must match the other one. | ||
* Files must be unlocked before other programs can access them, and before the file is closed. | * Files must be unlocked before other programs can access them, and before the file is closed. | ||
* [[Keywords_currently_not_supported_by_QB64#Keywords_Not_Supported_in_Linux_or_MAC_OSX_versions|Keyword Not Supported in Linux or MAC versions]] | * [[Keywords_currently_not_supported_by_QB64#Keywords_Not_Supported_in_Linux_or_MAC_OSX_versions|Keyword Not Supported in Linux or MAC versions]] | ||
| Line 20: | Line 20: | ||
{{PageSeeAlso}} | {{PageSeeAlso}} | ||
* | * [[LOCK]] | ||
* | * [[OPEN]] | ||
* | * [[ACCESS]] | ||
{{PageNavigation}} | {{PageNavigation}} | ||
Revision as of 21:28, 2 May 2022
This statement opens access to parts or all of a file to other programs and network users.
Syntax
- UNLOCK [#]fileNumber%
- UNLOCK [#]fileNumber%, record&
- UNLOCK [#]fileNumber%, [firstRecord&] TO lastRecord&
Description
- fileNumber% is the file number of the file to unlock.
- In the first syntax, the entire file is unlocked.
- In the second syntax, record& is the record number of the file to unlock.
- In the third syntax, the records or bytes in the range [firstRecord&,lastRecord&] are unlocked. If firstRecord& is omitted, it is assumed to be the first record or byte.
- For files opened in BINARY mode, each record corresponds to a single byte.
- LOCK and UNLOCK statements are always used in pairs and each statement must match the other one.
- Files must be unlocked before other programs can access them, and before the file is closed.
- Keyword Not Supported in Linux or MAC versions
See also