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Thanks for the help rxbagain. The problem is that this will be used with other source code other than VB and have been edicted to not use activeXdlls. I think I am getting a better grasp on things...

In the main calling code I changed the line from

ParseBDF FName

to

ParseBDF StrConv(FName, vbUniCode)

checking FName in the dll gives the correct filename for FName.

Actually, the close FNum statement is not the culprit. I added a message box after that line to see what FName is, and it comes up ?????????. However, just before calling the dll I have teh same...

The actuall dll code is rather long, but the calling routine is as follows

Private Declare Sub ParseBDF Lib _
"C:\MyDllLibrary\BDF Parser\BDFParserDLL.dll" _
(ByVal FName As String) ',...

I am trying to pass a filename from and executable to a dll and I get the error listed in the title. Any thoughts on how to correct this?

rxbagain,

Must have had something wrong when I tried your last suggestion of converting the string to unicode before passing to the dll. I tried it again and it seems to be working fine now. ...

rxbagain,

Sorry for the long delay in replying, I have been out of the office for the last week. converiting to unicode before passing to the dll didn't work. I added a line in the code to see...

yes to the first question

tFSR and tFSL are the same functions in the dll. Just making a check for this example. Here they are.

'this function right justifies FSString into a field StrinLen...

ok, this works when for truncating the length, but now I no longer get the string returned. Instead, I get ?? in place of the string.

mind you, this is a rather simple test code

Private Declare Function FSR Lib _
"C:\MyDllLibrary\BDF Formatting\BDFFormatting.dll" _
(ByRef FSString As Any, ByRef StrinLen As Integer) As...

no luck rxbagain

Thanks Pinky98.

Is there any work around for this tha I can implement?

I have a dll that takes a string and character length. It is supposed to returned the string justified based on the character length (fixed field sizes). However, when the string returns from the...