Create a theme for all form in VB.NET

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VB

   Public backcolor1 As Color = Color.blue
   Public bawhite As Color = Color.White

Public Sub themes()

  Me.BackColor = backcolor1
        PictureBox1.BackColor = backcolor1
        Dim cControl As Control
        For Each cControl In Me.Controls

            If (TypeOf cControl Is Button) Then
                cControl.ForeColor = Color.Black
                cControl.Font = New Font(cControl.Font, FontStyle.Bold)
            End If

          
            If (TypeOf cControl Is TextBox) Then
                cControl.ForeColor = Color.Black
                cControl.Font = New Font(cControl.Font, FontStyle.Bold)
                cControl.BackColor = bawhite
            End If
            If (TypeOf cControl Is CheckBox) Then
                cControl.ForeColor = Color.Black
                cControl.Font = New Font(cControl.Font, FontStyle.Bold)
                cControl.BackColor = backcolor1
            End If
            If (TypeOf cControl Is ComboBox) Then
                cControl.ForeColor = Color.Black
                cControl.Font = New Font(cControl.Font, FontStyle.Bold)
                cControl.BackColor = bawhite
            End If
            
           
        Next cControl
    End Sub

What I have tried:

what i have tried to run themes in all forms at the load it don`t function in the second from how do i code and call so it can be use full in all forms