HCheckUnaltered (Function)

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HCheckUnaltered (Function)

In french: HVérifieInaltéré

Available only with these kinds of connection

Checks whether one or all records in an unalterable data file have not been modified (with an hexadecimal editor for example).

Caution:

This function is available from version 23. For Client/Server files, the HFSQL Client/Server engine must be in version 23 (or later).
An altered record can be read if the record header is not altered.

Example

// Check all records found in MyCustomerFile
IF HCheckUnaltered(MyCustomerFile) = True THEN
Trace("No record was modified")
ELSE
Trace("The file was altered")
END

Syntax

<Result> = HCheckUnaltered(<Data file> [, <Record> [, <Progress Bar>]])

<Result>: Boolean

True if the record was not altered,
False otherwise. In this case, ErrorInfo returns the list of altered records.

<Data file>: Character string

Name of HFSQL data file to check.

<Record>: Optional integer or Integer constant

Number of the record to check.
Constant used to specify the record to check:
hCurrentRecNum Check the current record.
hRecNumAll
(Default value) Check all records.

<Progress Bar>: Optional control name or window name

Name of window where the progress bar will be displayed.
Name of Progress Bar control that displays the progress.
This parameter is ignored.

Component: wd270hf.dll