This adds checkboxes from the Forms toolbar to a worksheet:
Option Explicit
Sub addCBX()
Dim myCBX As CheckBox
Dim myCell As Range
With ActiveSheet
.CheckBoxes.Delete 'nice for testing
For Each myCell In ActiveSheet.Range("B1:B600").Cells
With myCell
Set myCBX = .Parent.CheckBoxes.Add _
(Top:=.Top, Width:=.Width, _
Left:=.Left, Height:=.Height)
With myCBX
.LinkedCell = myCell.Offset(0, 1).Address(external:=True)
.Caption = "" 'or whatever you want
.Name = "CBX_" & myCell.Address(0, 0)
End With
End With
Next myCell
End With
End Sub