Controls collection question - beginner's query

[mogura]

I've got a group box with 10 check boxes on a form and a 'Select All' button and Reset button. In the General Declarations I've declared Dim c as Control, then in the click event of the 'Select All' button I've got the following code:

For Each c in Controls
If Typeof (c) Is Checkbox
c.Checked = True
End If
Next

I'm having build problems, however, and the message "Checked is not a member of 'Systems.Windows.Forms.Control'"

Is there something blindingly obvious I'm overlooking?

Any help would be great.

 

[RiverGuy]

For Each c in Controls
   If Typeof (c) Is Checkbox
      Dim ch As CheckBox = c
      ch.Checked = True   
   End If
Next

 

[mogura]

Thanks. This works, the above message no longer appears and all the checkboxes are selected when I click 'Select All'if I haven't got them placed in a groupbox, but if they're placed in a groupbox, they aren't selected - nothing happens.

Any suggestions would be much appreciated.

 

[RiverGuy]

The CheckBoxes in the GroupBox are in the GroupBoxe's Controls collection, not the form's Controls collection. There are plenty of examples in this forum. Do a search for recursion.