Sometimes there are events in life then a invalid filename or foldername has sneaked in due to human misspelling or a crash and causing you headache because you just doesn't find the tiny little error.
I'm notorius in about the shell so this effortless example is no excption and very handy

Code:
Public Declare Function SHCreateStreamOnFileEx Lib "shlwapi" (ByVal pszFile As Long, ByVal grfMode As STGM, ByVal dwAttributes As FILE_ATTRIBUTES, ByVal fCreate As Long, ByVal pstmTemplate As Long, ppSTM As IStream) As Long

Dim hr As Long: hr = SHCreateStreamOnFileEx(StrPtr(CStr(sFileOrPath)), STGM_READ, 0, 0, 0, Nothing): If hr = &H80070002 Then MsgBox "File does not exist! Must quit!", vbCritical: Exit Function
Yes, I know PathFileExistsW exists but mine is funnier (I do think that one uses same princip)
Yes, you need Fafalone's TypeLib or Similar.