https://learn.microsoft.com/ja-jp/dotnet/api/microsoft.visualbasic.compatibility.vb6.savefiledialogarray.resetindex?view=netframework-4.8.1
SaveFileDialogArray.ResetIndex(SaveFileDialog) Method (Microsoft.VisualBasic.Compatibility.VB6) |...
The ResetIndex method is not supported in the SaveFileDialogArray class.
methodmicrosoftvisualbasiccompatibility