Making keydown code only run once, at the START of the press - vb.net

Question

I am writing a piece of code that when a button is pressed, it creates a picture box, but when you hold down the same key, that picture box needs to grow.
At first my code repeated the creation of the box, but now I have tried the code below and instead it creates it once, but at the end of the code. Does anyone know how some code to execute part of a key down code on the first instance that it is held down, and only once?
Private Class Form1
Dim KeyHolding As Boolean = False
Private Sub Btn_1_KeyDown(sender As Object, e As KeyEventArgs) Handles Btn_1.KeyDown
If Not KeyHolding Then 'the events which are activated once only when the key is pressed
KeyHolding = True
Dim PB As New PictureBox With {.Width = Btn_1.Width - 2, .Height = 10, .Top = Btn_1.Top + 20, .Left = Btn_1.Left + 1, .BackColor = Color.Cyan}
PB.Name = "PB_1"
TestPanel.Controls.Add(PB)
Else 'the events which are constantly done when the key is held
End If
End Sub
Private Sub Btn_1_KeyUp(sender As Object, e As KeyEventArgs) Handles Btn_1.KeyUp
Btn_1.BackColor = SystemColors.Control
KeyHolding = False
End Sub

Answer 1

Try this
Dim KeyHolding As Boolean = False
Dim PB As PictureBox
Private Sub Btn_1_KeyDown(sender As Object, e As KeyEventArgs) Handles Btn_1.KeyDown
If Not KeyHolding Then 'the events which are activated once only when the key is pressed
KeyHolding = True
PB = New PictureBox With {.Width = Btn_1.Width - 2, .Height = 10, .Top = Btn_1.Top + 20, .Left = Btn_1.Left + 1, .BackColor = Color.Cyan}
PB.Name = "PB_1"
TestPanel.Controls.Add(PB)
Else 'the events which are constantly done when the key is held
PB.Width += 10
PB.Height += 10
End If
End Sub
Private Sub Btn_1_KeyUp(sender As Object, e As KeyEventArgs) Handles Btn_1.KeyUp
Btn_1.BackColor = SystemColors.Control
End Sub