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Asked: 2026-05-10T21:35:37+00:00

I can do this: Dim fso As New FileSystemObject or I can do this:

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I can do this:

Dim fso As New FileSystemObject

or I can do this:

Dim fso As Object Set fso = CreateObject('Scripting.FileSystemObject')

How do I know what string to use for CreateObject? For example, how would I know to use the ‘Scripting.’ part of ‘Scripting.FileSystemObject’? Where do you go to look that up?

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1 Answer

  1. It is the ProgID of the component which is registered in Windows registry under HKCR key:

    HKEY_CLASSES_ROOT\Scripting.FileSystemObject

    ProgID’s are human readable identifiers for COM objects. They point to the actual CLSIDs, which in this case is:

    HKEY_CLASSES_ROOT\CLSID\{0D43FE01-F093-11CF-8940-00A0C9054228}

    This is the place where you can find the actual COM .dll that includes the implementation of the component.

    In the first sample code you have provided you are doing an early-binding, and in the second one you are doing a late-binding.

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