Between the FtpFindFirstFile and the InternetCloseHandle calls, the application cannot make another FtpFindFirstFile call for a given FTP session handle. If nevertheless such call is made, the function fails with ERROR_FTP_TRANSFER_IN_PROGRESS error.
The handle returned by the FtpFindFirstFile must be closed with the InternetCloseHandle function when no longer needed.
The FindFirstFile has no such limit; it can have muliple handles opened at the same time.
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