Peter
Something along these lines should work...
Create a text box in the detail section of your report called 'txtNoOfTicks'
Create an event procedure for the On Format event of the detail section and put the following code in it:
Me![txtNoOfTicks] = CountTicks(Me,acDetail)
Create this function either on the report or in a module:
Function CountTicks(rpt As Report,Sect as Integer) As Integer
Dim ctrl As Control
Dim count As Integer
For Each ctrl In rpt.Section(Sect).Controls
If ctrl.ControlType = acCheckBox Then
If ctrl.Value Then
count = count + 1
End If
End If
Next
countticks = count
End Function
It cycles through all the controls in the section, and for those that are tick boxes, checks the value stored in the tick box.
Brian