I have a form in which information is entered, it's like a pop-up window.
There is some function that prevents me from using the previous form with just a click, the problem is that it is only clicked and remains open, I hope I have understood.
You can open a form in two ways:
Form.Show (): open the form as a normal window. Therefore, when it is open, you can still work with other open forms (for example, switch between them).
Form.ShowDialog (): opens the form with modal instance, therefore, until you close the form you will not be able to access the other forms.