Check/Uncheck all checkboxes with VBA

Hello everyone I am very new in website and Office 2007 Ribbon UI
I add two checkBoxes in the ribbon using xml (with Custom UI Editor for Microsoft Office) ,They execute vba code called KOLONAC and it works fine.What I need that is to check/uncheck all checkBoxes with another sub. My xml codes :

HTML Code:

---

<checkBox id ="F20"  label="F2"    tag="F20"    getPressed="GetPressed" onAction="KOLONAC" />
<checkBox id ="F21"  label="F21" tag="F21"  getPressed="GetPressed"  onAction="KOLONAC" />

---

And I need to put some extra code inside of this sub to uncheck all checkboxes

Code:

---

Sub Button29_Click(control As IRibbonControl)
      Sheets("Main Sheet").Columns("B:ZZ").Hidden = True
'some code too add here to uncheck all checkboxes
          End Sub

---

I will be really really happy if you help me.

1. Your XML will need the onLoad to set a VBA IRibbon object (e.g. oRibbon)

2. I'd keep the check box status in a Boolean bF20, bF21, etc. so you need to change KOLONAC

3. Inside Button29_CLick I'd add

bF20 = False
bF21 = False
...

oRibbon.Invalidate



Here's something that uses TobbleButtons, but the concept is the same

http://www.vbaexpress.com/forum/show...ssing-anywhere

Tanks for help!