Sometimes it might want to pass parameters between individual forms, there are two ways to achieve:
1. In the MDI form, to reference the data in the parent form between the child form, with the following methods:
FormParent fm_parent = (formparent) this.
Mdiparent;
Description: FormParent is the name of the parent form
2. In the case where a form is popped up from the main form, it is available.
Owner method
Formmain frm_owner = (formmain) this.owner;
Description: FormMain is a main form, the current form is called by the main window, and when the main form is set at the main form, the main form is set.
