How can I add checkbox to GemBox.spreadsheet excel in c#

Question

I try this code, but FormControls not working!

var workbook = new ExcelFile();
var worksheet = workbook.Worksheets.Add("Sheet 1");
var checkBox = worksheet.FormControls.AddCheckBox("Simple check box", "B2", 100, 15, LengthUnit.Point);
checkBox.CellLink = worksheet.Cells["A2"];
checkBox.Checked = true;