Certain Microsoft Office Excel 2003 properties do not appear in the Object Browser or in Microsoft IntelliSense when you automate Excel by using C#

//Start Excel, and then add a new workbook.
Excel.Application oXl = new Excel.Application();
Excel.Workbooks oBooks = oXl.Workbooks;
Excel.Workbook oBook = 
	oBooks.Add(System.Reflection.Missing.Value);
Excel.Sheets oSheets = oBook.Sheets;

//Acquire a reference to the first worksheet in the new workbook.
Excel.Worksheet oSheet = (Excel.Worksheet)oSheets["Sheet1"];

//Acquire a reference to cell A1 on the worksheet, and then set the
//value for the range.
Excel.Range oRange = oSheet.get_Range("A1","A1");
oRange.set_Value(Excel.XlRangeValueDataType.xlRangeValueDefault,
	"Hello World!");

//Make Excel visible, and then give the user control.
oXl.Visible = true;
oXl.UserControl = true;