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FileFindFirstFile Question


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Quick question, no specific coding question, just curious to know what the difference is between FileFindFirstFile returning a -1 and setting the @error to 1. The help file seemed sort of vague whaen they state "Failure: Returns -1 if error occurs", what other kind of error could there be other than an empty directory? It seems to Return -1 when there are no files in the folder, but it also sets @error to 1. So what other errors (if any) would Return -1. Seems sort of redundant. Just curious.

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True this and I believe you will understand.

DirCreate(@MyDocumentsDir & '\Empty Folder') ;Create a new empty folder
$hFound = FileFindFirstFile(@MyDocumentsDir & '\Empty Folder\*.*')
MsgBox(0,'Empty folder results','@error = ' & @error & @CRLF & '$hFound= ' & $hFound & @CRLF)
DirRemove(@MyDocumentsDir & '\Empty Folder') ;Delete the dir just made

$hFound = FileFindFirstFile(@MyDocumentsDir & '\Not A Real Filename.*')
MsgBox(0,'No matchinf file results','@error = ' & @error & @CRLF & '$hFound= ' & $hFound & @CRLF)
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There are other error conditions possible, like USB disk unexpected removal in the middle of the loop, access rights being suddenly changed (not sure there), you name it.

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FileFindFirstFile used to return "." and ".." within folders until they were removed as considered unnecessary at the time, or so it was thought. But some used those directory dots to know whether they were in a folder or the root of the drive. The @error condition was later added as a means to know whether FileFindFirstFile is searching an empty folder or not. If you do get the return of -1 and you do not get @error set then your probably in the root of an empty drive.

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