Create a new CellStyle with a Boolean DataType and set it to any Cell that you need. Here’s the code to implement it, assuming the cell is in Row 1 and Column 1:
//Implement 2 fixed rows
c1FlexGrid1.Rows.Fixed = 2;
//create and set a new style to the reqd. cell
var cs = c1FlexGrid1.Styles.Add("Boolean");
//set DataType
cs.DataType = typeof(Boolean);
//Set any alignment
cs.ImageAlign = C1.Win.C1FlexGrid.ImageAlignEnum.CenterCenter;
c1FlexGrid1.SetCellStyle(1, 1, cs);
Thanks, Richa