System.AccessViolationException while in a loop

[borris83]

Hi everyone,

Here is a part of my code which loops through the items in a checkedlistbox.. The text of each item is the name of a computer...

When the loop runs for the first time, it runs fine, but when it goes through the loop the second time I am getting the following exception:

Attempted to read or write protected memory. This is often an indication that other memory is corrupt

The code connects to wmi and retrieves the time zone information from the registry.. It is given below:

 For Each item As String In checkedListBox1.CheckedItems
            strcomputer = item

        oreg = GetObject("winmgmts:{impersonationLevel=impersonate}!\\" & strcomputer & "\root\default:StdRegProv")

            strkeypath = "System\CurrentControlSet\Control\TimeZoneInformation"

            strvaluename = "ActiveTimeBias"

'the below line is the one which creates the problem
 [B]oreg.GetDWORDValue(HKEY_LOCAL_MACHINE, strkeypath, strvaluename, dwvalue[/B])

                lngTZBias = dwvalue

' then there are lines of code which does something with 'lngTZBias .. That works just fine...

next

So, if the checkedlistbox has only one item checked, the code runs fine... If you check more than one box, it gives problem... any idea?

 

[borris83]

I got it working now... I declared the variable dwvalue inside the 'For Next' loop... I didn't know why it worked and why it wasn't before, but it simply occured to me because this one variable was little suspicious...