Question: I have a tooltip for a Label and I want it to stay open until the user
moves the mouse to a different control.

I have tried the following properties on the tooltip:

```
StaysOpen="True"

```

and

```
ToolTipService.ShowDuration = "60000"

```

But in both cases the tooltip is only displayed for exactly 5 seconds.

Why are these values being ignored?

Answer: 
If you want to set this for just one tooltip, set the duration on the object having the Tooltip, like this:

```
<Label ToolTipService.ShowDuration="12000" Name="lblShowTooltip" Content="Shows tooltip">
    <Label.ToolTip>
        <ToolTip>
            <TextBlock>Hello world!</TextBlock>
        </ToolTip>
    </Label.ToolTip>
</Label>

```

I'd say that this design was chosen because it allows same tooltip with different timeouts on different controls.

If you want this globally for your whole app, see the accepted answer.
Just for the sake of completeness:
In code it looks like this:

```
ToolTipService.SetShowDuration(element, 60000);

```