User Control question

[jmsrickland]

What is AmbientMode and Ambient.UserMode and when are they True and when are they False? What's the purpose?

[4x2y]

It is allow the control to determine whether it's executing at design time (UserMode = False) or at run time.

Read this topic for more details.

[jmsrickland]

It is allow the control to determine whether it's executing at design time (UserMode = False) or at run time.

Read this topic for more details.

If I run the project from the IDE is it considered design time or run time? I ask because when I am in the VB IDE and I run the project UserControl.Ambient.UserMode is always True. Is that the way it is supposed to be?

Another question: What is the difference between the keywords UserControl and Me when used in a UserControl?

[4x2y]

If I run the project from the IDE is it considered design time or run time? I ask because when I am in the VB IDE and I run the project UserControl.Ambient.UserMode is always True. Is that the way it is supposed to be?

From MSDN article:

The most important property of the AmbientProperties object is UserMode, which allows an instance of your control to determine whether it's executing at design time (UserMode = False) or at run time. Use of this property is discussed in "Creating Design-Time-Only or Run-Time-Only Properties," later in this chapter.

Tip To remember the meaning of UserMode, recall that at design time the person working with your control is a developer, rather than an end user. Thus the control is not in "user" mode, so UserMode = False.

So it is always True at run time, False at design time. To well understand this property, create new project, add UserControl and paste this code

Private Sub UserControl_Resize()
    If UserControl.Ambient.UserMode = True Then
        Label1.Caption = "UserControl.Ambient.UserMode = True " & Format(Now, "hh:MM:ss") ' just to know that part continuously invoked.
    Else
        Label1.Caption = "UserControl.Ambient.UserMode = False " & Format(Now, "hh:MM:ss")
    End If
End Sub

Another question: What is the difference between the keywords UserControl and Me when used in a UserControl?

The Me keyword does not work in a UserControl.

[jmsrickland]

From MSDN article:
So it is always True at run time, False at design time. To well understand this property, create new project, add UserControl and paste this code

OK, I see the difference now.

The Me keyword does not work in a UserControl.

Oh, but it does work in a UserControl. I further checked into this and it appears the difference is this:

UserControl has all the properties of a UserControl similar to what a Form has, whereas, Me has all the Public variables, Functions, and Subs that appear in the UserControl but not the Private ones.

[4x2y]

What i said is still true "The Me keyword does not work in a UserControl.", that is you cannot use Me in usercontrol like you do in a form.

[jmsrickland]

What i said is still true "The Me keyword does not work in a UserControl.", that is you cannot use Me in usercontrol like you do in a form.

Aw, yes, but that isn't what you said the first time. You simply said the Me keyword does not work in a UserControl. I can see that they don't expose the same properties.