For each checkbox in userform1

Hello to everyone.
I created a userform (UserForm1), and inside this form I placed 20 textboxes and 20 checkboxes.
Everytime I make the userform to appear, I need all the checkboxes to be false and all the listboxes to be empty
One question at a time...
I can write down 20 rows to set each checkbox value=false but I would like to have something better
I tried
For i = 1 To 20
UserForm1.Controls("CheckBox" & Chr(64 + i)).Value = False
Next i
but it says runtime error, impossible to find the specified object
These instructions are placed in the command button macro, just before the UserForm1.show line

How can I fix the error?
Thanks to everyone

O.

Hi prizeGotti, and thank you for the immediate reply !

I was making some T&E, and I came out with this code

Dim ctl As Control

For Each ctl In UserForm1.Controls
If TypeName(ctl) = "CheckBox" Then
ctl.Value = False
End If
Next

For Each ctl In UserForm1.Controls
If TypeName(ctl) = "TextBox" Then
ctl.Value = ""
End If
Next

that is substantially identical to what you suggest.
One question: I placed it in the UserForm_Activate to make sure it runs every time I open the UserForm...
Is the Initialize run only the first time or every time?
And if it runs all the time, then what is the difference between activate and initialize?
I was lead to think
Initialize = only the first time
Activate = evey time the userform pops up...

O.

Apologies, yes, I meant to say the UserForm_Activate event, had only just woken up.

Good morning and thanks to all helped solving the question !