An alternative help file builder: Sandcastle File Builder[^]

You shouldn't use the .NET oracle data provider, because the libraries are deprecated. A cite:

Quote:

The types in System.Data.OracleClient are deprecated. The types are supported in version 4 of the .NET Framework but will be removed in a future release. Microsoft recommends that you use a third-party Oracle provider.

Source: Oracle and ADO.NET[^]

You can pass a reference to that label to a method in the class library:

public void SetText(ref Label myLabel, string text)
{
myLabel.Text = text;
}

Have you subscribed to the MyAppForm_MouseLeave event in the some part of the code? If not you need to subscribe to it and then you can use a event handler to handle that event.

Refer to the following blog post: Writing a Desktop Sharing Application