Read a long string (of up to 1024 characters) from a single cell
BOOL GetLongStringA( CStringA& strText ) const;
If the function succeeds, this will contain the entire string contained in the target cell.
Returns TRUE if the function was successful, FALSE if it failed. The function can fail if the CXlOper does not contain a reference to a single cell, or if it cannot be run in Excel at this time.
This function retrieves the entire string contained in a cell, even if the string contains more than 255 characters. The calling object must contain a reference to a single cell.