Unchecking a checkbox in separate worksheet using VBA

Hi,

I have a workbook containing many different sheets. What I want to accomplish is when I click on a check box on one sheet, I want the check box in a different worksheet to be unchecked. I have form control checkboxes in my workbook, so I used xlOff as the value.

Here's what I have in my VBA code.

Worksheets("February").CheckBoxes("CheckBox13").Value = xlOff

It is giving me the error "Unable to get the CheckBoxes property of the Worksheet class"

try this
Worksheets("February").CheckBox13.Value = True

try this
Worksheets("February").CheckBox13.Value = True

Now it is saying "Object doesn't support this property or method"

Now it is saying "Object doesn't support this property or method"