Adding labels and other controls to a groupbox dynamically in vb.net not working? - vb.net

Question

So I've been having problems adding labels from a record structure into a groupbox that stack below each other vertically. I could use a Flow Layout Panel but I have multiple labels I need to add from data in a record structure which I want to be able to scroll later with a vertical scrollbar as the autoscroll will only work with one panel only, and not all of them.
For some reason the program puts only one label in, and the others don't seem to be visible even though they have been created (I used a messagebox to check). Could someone please help me to put them in, as I am fairly new to programming and need help.
For context, the program loads 'materials' from an xml file and stores it in a record structure, then this bit of the program creates labels and radio buttons dynamically and puts it in a groupbox, so that it can be arranged manually on a pretty grid that will all become scrollable by using a scrollbar later.. Because the data I am working with is all related, and can have strings of multiple sizes (names and suppliers of materials for example) I didn't want to attempt to add whitespace to make the grid work but with a single label (not that the others would show beneath the first for some reason)
CODE:
'sets up Labels for editing materials
prgFunctions.loadMat()
Dim counter As Integer
Dim newMatIDLabel(numMatFile) As Label
Dim newMatRdb(numMatFile) As RadioButton
Dim lastPos As Integer
'testing to see if materials load GET RID OF LATER
' For counter = 1 To numMatFile
'ListBox1.Items.Add(materials(counter).matName)
' Next
'create the labels with information
For counter = 1 To numMatFile
'ID
newMatIDLabel(counter) = New Label
newMatIDLabel(counter).Name = "lblMatIDNum" & counter
newMatIDLabel(counter).Text = materials(counter).matID
newMatIDLabel(counter).Parent = gbxMaterials
' MsgBox(newMatIDLabel(counter).Name & " " & newMatIDLabel(counter).Text)
Next
'create the checkboxes NOW RADIO BUTTONS
For counter = 1 To numMatFile
newMatRdb(counter) = New RadioButton
newMatRdb(counter).Name = "chkMatSelectNum" & counter
newMatRdb(counter).Text = ""
newMatRdb(counter).Parent = gbxMaterials
Next
'matID locations
lastPos = 10
For counter = 1 To numMatFile
'SOMEHOW MOVE IT INTO THE GROUPBOX INSTEAD, as issues arise everywhere
newMatIDLabel(counter).Location = New Point(7, lastPos + 10)
lastPos = lastPos + 10
Next

Answer 1

Why not just:
lastPos = 10
For counter = 1 To numMatFile
Dim label As New Label
label.Name = "chkMatSelectNum" & counter
label.Text = materials(counter).matID
label.Location = New Point(7, lastPos)
label.Visible = True
gbxMaterials.Controls.Add(label)
lastPos += label.Height
Next

Answer 2

Based on F0r3v3r-A-N00b's answer:
The label has a height of 23, so it seems it is hiding the others.
This works for me:
Dim lastPos As Integer = 20
For counter As Integer = 1 To numMatFile
Dim label As New Label
label.Name = "chkMatSelectNum" & counter
label.Text = materials(counter).matId
label.AutoSize = True
label.Visible = True
label.Location = New Point(7, lastPos)
gbxMaterials.Controls.Add(label)
lastPos += 17
Next