Hi all,
I am getting some unexpected behavior in WinForms 2.0 with VS2005 SP1.

Scenario:

Start a new WindowsApplication project in vb.

Paste the following code into the .vb code behind of Form1, and the designer
code into the .Designer.vb.

Public Class Form1

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
       Me.ItemDisabledToolStripMenuItem.HideDropDown()
   End Sub

   Private Sub ItemDisabled_ChildEnabledToolStripMenuItem_Click(ByVal
sender As System.Object, ByVal e As System.EventArgs) Handles
ItemDisabled_ChildEnabledToolStripMenuItem.Click
       MessageBox.Show("OOPS!")
   End Sub

End Class

<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class Form1
   Inherits System.Windows.Forms.Form

   'Form overrides dispose to clean up the component list.
   <System.Diagnostics.DebuggerNonUserCode()> _
   Protected Overrides Sub Dispose(ByVal disposing As Boolean)
       Try
           If disposing AndAlso components IsNot Nothing Then
               components.Dispose()
           End If
       Finally
           MyBase.Dispose(disposing)
       End Try
   End Sub

   'Required by the Windows Form Designer
   Private components As System.ComponentModel.IContainer

   'NOTE: The following procedure is required by the Windows Form Designer
   'It can be modified using the Windows Form Designer.  
   'Do not modify it using the code editor.
   <System.Diagnostics.DebuggerStepThrough()> _
   Private Sub InitializeComponent()
       Dim resources As System.ComponentModel.ComponentResourceManager =
New System.ComponentModel.ComponentResourceManager(GetType(Form1))
       Me.ToolStrip1 = New System.Windows.Forms.ToolStrip
       Me.ToolStripDropDownButton1 = New
System.Windows.Forms.ToolStripDropDownButton
       Me.ItemEnabledToolStripMenuItem = New
System.Windows.Forms.ToolStripMenuItem
       Me.ItemEnabled_ChildEnabledToolStripMenuItem = New
System.Windows.Forms.ToolStripMenuItem
       Me.ItemDisabledToolStripMenuItem = New
System.Windows.Forms.ToolStripMenuItem
       Me.ItemDisabled_ChildEnabledToolStripMenuItem = New
System.Windows.Forms.ToolStripMenuItem
       Me.ToolStrip1.SuspendLayout()
       Me.SuspendLayout()
       '
       'ToolStrip1
       '
       Me.ToolStrip1.Items.AddRange(New
System.Windows.Forms.ToolStripItem() {Me.ToolStripDropDownButton1})
       Me.ToolStrip1.Location = New System.Drawing.Point(0, 0)
       Me.ToolStrip1.Name = "ToolStrip1"
       Me.ToolStrip1.Size = New System.Drawing.Size(626, 25)
       Me.ToolStrip1.TabIndex = 0
       Me.ToolStrip1.Text = "ToolStrip1"
       '
       'ToolStripDropDownButton1
       '
       Me.ToolStripDropDownButton1.DisplayStyle =
System.Windows.Forms.ToolStripItemDisplayStyle.Image
       Me.ToolStripDropDownButton1.DropDownItems.AddRange(New
System.Windows.Forms.ToolStripItem() {Me.ItemEnabledToolStripMenuItem,
Me.ItemDisabledToolStripMenuItem})
       Me.ToolStripDropDownButton1.Image =
CType(resources.GetObject("ToolStripDropDownButton1.Image"),
System.Drawing.Image)
       Me.ToolStripDropDownButton1.ImageTransparentColor =
System.Drawing.Color.Magenta
       Me.ToolStripDropDownButton1.Name = "ToolStripDropDownButton1"
       Me.ToolStripDropDownButton1.Size = New System.Drawing.Size(29, 22)
       Me.ToolStripDropDownButton1.Text = "ToolStripDropDownButton1"
       '
       'ItemEnabledToolStripMenuItem
       '
       Me.ItemEnabledToolStripMenuItem.DropDownItems.AddRange(New
System.Windows.Forms.ToolStripItem()
{Me.ItemEnabled_ChildEnabledToolStripMenuItem})
       Me.ItemEnabledToolStripMenuItem.Name = "ItemEnabledToolStripMenuItem"
       Me.ItemEnabledToolStripMenuItem.Size = New System.Drawing.Size(152,
22)
       Me.ItemEnabledToolStripMenuItem.Text = "ItemEnabled"
       '
       'ItemEnabled_ChildEnabledToolStripMenuItem
       '
       Me.ItemEnabled_ChildEnabledToolStripMenuItem.Name =
"ItemEnabled_ChildEnabledToolStripMenuItem"
       Me.ItemEnabled_ChildEnabledToolStripMenuItem.Size = New
System.Drawing.Size(212, 22)
       Me.ItemEnabled_ChildEnabledToolStripMenuItem.Text =
"ItemEnabled_ChildEnabled"
       '
       'ItemDisabledToolStripMenuItem
       '
       Me.ItemDisabledToolStripMenuItem.DropDownItems.AddRange(New
System.Windows.Forms.ToolStripItem()
{Me.ItemDisabled_ChildEnabledToolStripMenuItem})
       Me.ItemDisabledToolStripMenuItem.Enabled = False
       Me.ItemDisabledToolStripMenuItem.Name =
"ItemDisabledToolStripMenuItem"
       Me.ItemDisabledToolStripMenuItem.Size = New System.Drawing.Size(152,
22)
       Me.ItemDisabledToolStripMenuItem.Text = "ItemDisabled"
       '
       'ItemDisabled_ChildEnabledToolStripMenuItem
       '
       Me.ItemDisabled_ChildEnabledToolStripMenuItem.Name =
"ItemDisabled_ChildEnabledToolStripMenuItem"
       Me.ItemDisabled_ChildEnabledToolStripMenuItem.Size = New
System.Drawing.Size(214, 22)
       Me.ItemDisabled_ChildEnabledToolStripMenuItem.Text =
"ItemDisabled_ChildEnabled"
       '
       'Form1
       '
       Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
       Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
       Me.ClientSize = New System.Drawing.Size(626, 272)
       Me.Controls.Add(Me.ToolStrip1)
       Me.Name = "Form1"
       Me.Text = "Form1"
       Me.ToolStrip1.ResumeLayout(False)
       Me.ToolStrip1.PerformLayout()
       Me.ResumeLayout(False)
       Me.PerformLayout()

   End Sub
   Friend WithEvents ToolStrip1 As System.Windows.Forms.ToolStrip
   Friend WithEvents ToolStripDropDownButton1 As
System.Windows.Forms.ToolStripDropDownButton
   Friend WithEvents ItemEnabledToolStripMenuItem As
System.Windows.Forms.ToolStripMenuItem
   Friend WithEvents ItemEnabled_ChildEnabledToolStripMenuItem As
System.Windows.Forms.ToolStripMenuItem
   Friend WithEvents ItemDisabledToolStripMenuItem As
System.Windows.Forms.ToolStripMenuItem
   Friend WithEvents ItemDisabled_ChildEnabledToolStripMenuItem As
System.Windows.Forms.ToolStripMenuItem

End Class
------------------------------------

This will give you a form with a tool strip containing one drop down button.
It's drop down items are one enabled and one disabled toolstripmenuitem.  
The enabled item has an enabled "child", and the disabled item also has an
enabled "child".  The disabled item also has had its HideDropDown method
called in form load.

Given this scenario, I would expect to not be able to reach the child item
of the disabled ToolStripMenuItem.  In fact, if you drop down the toolstrip
dropdownbutton, and you FIRST go to the disabled ToolStripMenuItem, this
expected behavior is what you get.  However, if you then shift focus to the
enabled ToolStripMenuItem, and then back to the disabled one, all of a sudden
its child is displayed!

Is this expected behavior or a bug?

Thanks.