VS 2005 Difference Between Adding A Control From Toolbox Vs. In Code?

The particular control I'm trying to figure out is a UserControl. When I design it as a separate DLL, add it to the Toolbox, then drag it onto the form, it shows up. But when I declare the instance in Form_Load & add it to the Forms Controls, it doesn't show up. (Note that I'm dealing with two different UserControls here as what I don't really want to do is create it as a DLL. It's specific to this project & that's where I want it-in this project. I suppose I could create it as a separate project in this solution, but again-that's not what I want to do. I can add a UserControl to this project, but I can't seem to *use* it. Frustrating.)

Dim X As New Class3
X.Size = New System.Drawing.Size(96, 74)
X.Location = New System.Drawing.Point(5, 5)
Me.Controls.Add(X)
Me.Refresh()

Class3 inherits System.Windows.forms.UserControl, and contains a label.OK, found that I can make the UserControl appear by setting the BackColor (X.BackColor=). Doesn't seem like I should need to do that as it's set in Class3, but apparently when I add it to the form it picks up the form's backcolor-which might be the way UserControls work.

But, it still doesn't show the label that's on the UserControl-just a block of color where I placed the UserControl.And now, I might have solved this problem only to raise another. I finally noticed that although Class3 had an InitializeComponent sub it lacked a Sub New-so it never called the InitializeComponent sub.

I added a Sub New that does nothing except call InitializeComponent & now I'm getting the whole thing. I guess now the question is why the Sub New is required for Class3 but not for the DLL? (Or maybe it was created automatically for the DLL but not for Class3? I'll check the hidden code in the DLL project to see if it was created or not.)