get value from child from to parent form
问题 i have 2 form in my media player project i have make object of from1 (parent form) and by that get value from form1 in form3. but i also need to get value of a variable from form3 to form1. but the problem is that when i make the object of form3 in form1 like this Form3 m_child; public Form1(Form3 frm3) { InitializeComponent(); m_child = frm3; } it shows the error in the program.cs that from1 does not contain a constructor that contain 0 argument . i know i have to pass there a parameter in