Filtering Excel and CSV files in a dialog

This is useful if you want to show only this type of files in a selection.

public Object dialog()
{
   DialogRunbase dialog = super();
   #AviFiles
   #Excel

    dialogFilename = dialog.addField(typeId(FilenameOpen));
    dialog.filenameLookupFilter   (["@SYS28576",#XLSX,"@SYS100852","*.csv"]);
dialog.filenameLookupTitle("Upload from EXCEL/CSV");
dialogFilename.value(filename);
    return dialog;
}