tooltip

[Kurt]

I just had a first look at the tooltip class. The only example given is ....

 

Private Sub CreateMyToolTip2()
   ' Create the ToolTip and associate with the Form container.
   Dim toolTip1 As New ToolTip(Me.components)

   ' Set up the delays for the ToolTip.
   toolTip1.AutoPopDelay = 5000
   toolTip1.InitialDelay = 1000
   toolTip1.ReshowDelay = 500
   ' Force the ToolTip text to be displayed whether or not the form is active.
   toolTip1.ShowAlways = True

   ' Set up the ToolTip text for the Button.
   toolTip1.SetToolTip(Me.Button1, "My button1")
End Sub

 

some questions and remarks:

 

1/ If I call the sub, I get an error 'Object reference not set to an instance of an object', and indeed, Me.components is not declared with the New() keyword. But it's an interface (System.ComponentModel.IContainer) and I don't think it's possible to create an instance of an interface using New().??? Anyways, I 'm not very home in these matters, but Dim toolTip1 As New ToolTip() does the trick, and associates by default the tooltip class to the container that is creating the instance...

 

 

2/ Suppose I would like to change the tooltip text of a control runtime, do I then have to declare a global instance of the tooltip class, so I can access it after the sub is finished? In this piece of code I would expect that the object ToolTip1 is ready to be collected by the garbage collector after the sub is finished. Still, the tooltip for the button is shown... It's even possible to attach a second tooltip to button1 by calling CreateMyToolTip2

 

Private Sub CreateMyToolTip2()
   ' Create the ToolTip and associate with the Form container.
   Dim toolTip1 As New ToolTip()

   ' Set up the delays for the ToolTip.
   toolTip1.AutoPopDelay = 5000
   toolTip1.InitialDelay = 100
   toolTip1.ReshowDelay = 500
   ' Force the ToolTip text to be displayed whether or not the form is active.
   toolTip1.ShowAlways = True

   ' Set up the ToolTip text for the Button.
   toolTip1.SetToolTip(Me.Button1, "Also My Button 1")
End Sub

 

Can someone clear out what actually is going on?

[divil]

1) This is correct, you don't actually need the ToolTip to be a part of a container for it to work just fine.

 

2) Yes, you ideally want the same instance to be around, so you'll have to declare it at form-level scope and use its SetToolTip method on the same control as many times as you like.

[Diablicolic]

What exactly is a tool tip? :confused:

[wyrd]

Hover your mouse over one of the graphical buttons on this web page for a few seconds. It'll pop up with a little message saying what the button is for. That's a tooltip.

[Diablicolic]

Oh sweet, I could use this! :p