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Dear All,
I get an error as follows. The codes of the application are shown below the screen capture.
I think that the parent is not yet available because the control was not added yet to a form or control.
Try executing the code inside the Load or ParentChanged event handlers.
Open your Panel user control in Form Designer and add the handler for Load event. Then move the problematic code (that creates the Lib object) to this handler.
When the user controls will be used in some of your form, the Parent will not be null.
When writing your code to read the value of .Parent, you should consider that null is a valid input, as documented by Microsoft in places such as
Setting .Parent to null explicitly has its meaning. And if you don't like that, you should assign whatever you like to .Parent when creating such UI controls.