Problem with modified Combobox class

  • Thread starter Thread starter Kevin
  • Start date Start date
K

Kevin

I've modified a combobox class so that it has a ReadOnly property.
When set to ReadOnly, the combobox can't be changed, but it doesn't
appear gray. I called the new class ComboLockBox and I've placed them
on a MDIChild form and they work great.

The problem is, I got a timer that looks for mouse activity and when
the mouse is idle for a set number of minutes, all MDIChild forms are
hidden and the Logon form is displayed.

When the user logs back on, the visible property of the forms is set
back to True. The ComboLockBox controls are no longer the modified
class I created, but are regular comboboxes and are grayed out.
Setting my ReadOnly property or the Enabled property of the boxes
doesn't change anything.

What's happening to my class?

Here's the code I use to hide the forms:

Try
For j = 0 To (Me.MdiChildren.Length) - 1
Dim tempChild As Form = CType(Me.MdiChildren(j), Form)
tempChild.Visible = False
Next
For i As Integer = 0 To My.Application.OpenForms.Count - 1
If My.Application.OpenForms(i).Name <> "frmMain" Then
My.Application.OpenForms(i).Visible = False
End If
Next
Catch
MsgBox(Err.Description, MsgBoxStyle.Critical, "AN ERROR
OCCURRED WHILE HIDING THE FORMS")
'do nothing
End Try


and this unhides the forms:

Dim m As System.Windows.Forms.Form

For Each m In My.Application.OpenForms
If m.Name <> "frmMain" Then
m.Visible = True
End If
Next m

For j = 0 To (Me.MdiChildren.Length) - 1
Dim tempChild As Form = CType(Me.MdiChildren(j), Form)
tempChild.Visible = True
Next
 
Have you tried setting a condition breakpoint that fires when the
enabled or readonly property changes? That may lead to the source of
the problem.

Thanks,

Seth Rowe
 
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