The current problem I'm facing is that the filters are not compliant as MS-FileDialog does, let me make it clear, when the DEV set the filter, for example, "JGRAM|*.jgram", if I try to select another file, with another extension, the dialog does not filter the files, when typing and pressing ENTER, see:

Please refer to the attached two gif file illustrating the default behavior of the MS OpenFileDialog and the RadOpenFileDialog.