Hides sheets in the active workbook
static int WorkbookHide( LPCTSTR sheet_text, bool very_hidden = false );
Sheet_text is the name of the sheet to hide.
Very_hidden specifies how the sheet is hidden.
Zero if the function has been called successfully; non-zero if the function could not be called. See Error codes for a list of return values.
See the Microsoft Excel on-line Help for full details about this function.