HCheckUnaltered (Function)

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HCheckUnaltered (Function)

In french: HVérifieInaltéré

Available only with these kinds of connection

Checks whether one or all records found 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 (with or without quotes)

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 : wd250hf.dll