Hi,
You can also calculate C1 value before like ..
A1:=0;
B1:=0;
C1:=0;
C1 := A1 + B1;
and then use -
ExcelBuf.AddColumn(A1, FALSE, '', FALSE, FALSE, FALSE, '#,##0.00', ExcelBuf."Cell Type"::Number);
ExcelBuf.AddColumn(B1, FALSE, '', FALSE, FALSE, FALSE, '#,##0.00', ExcelBuf."Cell Type"::Number);
ExcelBuf.AddColumn(C1, FALSE, '', FALSE, FALSE, FALSE, '#,##0.00', ExcelBuf."Cell Type"::Number);
Regards,
TK