creating and formatting table in c#.net windows forms

i have created a windows application that genarates a pdf file and added a table to the pdf file in the following way
Table T1 = new Table(6); in the same way i have added CELL to the table as CELL c=new CELL(); now the problem is that the text which  i am displaying in the cell is not alligned properly it is overlapping with the lower border of th cell. can anyone tell me that how can i align the cell text to center or middle i have tried all theattributess but it didnt work pls help me....