How to start :
1) Open an excel sheet.Will show you how it works on 2007. Navigate to File > Excel Options > Customize > Now select Developer tab from drop down
2) In Developer tab , select the “Insert Control ” option, add it to the “All Tabs” pane on right side and click the “OK” button.
3) Now you see “Insert Controls” tab/Button on your excel top ribbon. Click and you see lot many Controls like Form Control (Button, combo box,List etc) , ActiveX control(Img, Label, Radio button etc) .Select the “Checkbox” control from Form Controls as below
4) Now, you can drag and draw a checkbox anywhere on your excel sheet. Similarly with other controls. You can also play along with its properties.