Sure but you don't mention if you want to use C or VBS. You can do it in both so which is entirely up to you [:D]

Using C - http://support.automation.siemens.com/WW/view/en/14373387

Using VBS - http://www.computerperformance.co.uk/ezine/ezine36.htm
(The WinCC manual contains information about the FileSystemObject)

Hopefully this is enough to get you started.
Good luck !
Salma

Well now you can do it in C but I would use VBS as I find it easier for string manipulation.

Just did a quick test and put together the following script. It's not perfect and there may be a tidier way but it should be enough to get you started along the right path.

[code]
'|| "string_tag" contains the name of the file
'|| my report simply has the name "report"
'|| e.g. report_20060630010101001
'|| you will need to change the offsets in the Mid functions to
'|| reflect your report name

Dim file_name, new_file_name
Dim file_title, file_year, file_month, file_day, file_hour, file_minute, file_second
file_name = HMIRuntime.Tags("string_tag").Read

file_title = Mid(file_name, 1, 6)
file_year = Mid(file_name, 8, 4)
file_month = Mid(file_name, 12, 2)
file_day = Mid(file_name, 14, 2)
file_hour = Mid(file_name, 16, 2)
file_minute = Mid(file_name, 18, 2)
file_second = Mid(file_name, 20, 2)

new_file_name = file_title & "_" & file_year & "_" & file_month & "_" & file_day & "_" & file_hour & "_" & file_minute & "_" & file_second

MsgBox new_file_name

[/code]