I'm utilizing the code posted by Jesper Palm here: http://stackoverflow.com/questions/280891/make-user-control-display-outside-of-form-boundry

/// <summary>
/// A simple popup window that can host any System.Windows.Forms.Control
/// </summary>
public class PopupWindow : System.Windows.Forms.ToolStripDropDown
{
    private System.Windows.Forms.Control _content;
    private System.Windows.Forms.ToolStripControlHost _host;

    public PopupWindow(System.Windows.Forms.Control content)
    {
        //Basic setup...
        this.AutoSize = false;
        this.DoubleBuffered = true;
        this.ResizeRedraw = true;

        this._content = content;
        this._host = new System.Windows.Forms.ToolStripControlHost(content);

        //Positioning and Sizing
        this.MinimumSize = content.MinimumSize;
        this.MaximumSize = content.Size;
        this.Size = content.Size;
        content.Location = Point.Empty;

        //Add the host to the list
        this.Items.Add(this._host);
    }
}

I've translated it to VB:

Public Class PopupWindow
    Inherits System.Windows.Forms.ToolStripDropDown

    Private _content As System.Windows.Forms.Control
    Private _host As System.Windows.Forms.ToolStripControlHost

    Public Sub New(ByVal content As System.Windows.Forms.Control)

        Me.AutoSize = False
        Me.DoubleBuffered = True
        Me.ResizeRedraw = True

        Me._content = content
        Me._host = New System.Windows.Forms.ToolStripControlHost(content)

        Me.MinimumSize = content.MinimumSize
        Me.MaximumSize = content.MaximumSize
        Me.Size = content.Size
        content.Location = Point.Empty

        Me.Items.Add(Me._host)

    End Sub

End Class

It works great with a PictureBox showing its information. But for some reason I cannot get the DataGridView to display anything when it is in the popup.

If I pull the grid out of the popup it displays all of its information fine. If I pause during debug, the grid shows that it has all the data in it. It's just not displaying anything.

Does anybody have any ideas?