Get Open File Name To Open Multiple Files

I'm doing the following:

Dim myname As String
myname = Application. GetOpenFilename

I use it to attempt to open first a QuickBooks file and then an excel workbook.
The Quickbooks file opens fine. The Excel workbook never appears to open but
I do get the full file pathname to my excel workbook returned which I then
parse off to get just the workbook name.

Why would it behave this way? I open both these files manually all the time.

Also, I'm trying to use a filter as follows:

myname = Application.GetOpenFilename("*.QBW")

I get a compile error saying that I'm calling the function wrong.