Question

I have an mdi child form as a dockable content in my application and I want to disable/enable a listbox in it from the parent form depending on a certain event. I thought this would be simple as:

_child.listBox1.Enabled = false;

But it doesn’t seem to disable it. _child is an object reference of the mdi child form btw. Why does it not work and how can I fix this?

Answer 1

_child probably refers to a different instance of the child form.

Make sure that _child refers to the same instance that you called Show() on.