you can give the usercontol the functions/properties you need
public partial class MyUserControl : UserControl
{
public MyUserControl()
{
InitializeComponent();
}
public int CheckedListBoxAddItems(object item)
{
return checkedListBox1.Items.Add(item);
}
}
}
and then call them from your form code
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
myUserControl1.CheckedListBoxAddItems("item1");
myUserControl1.CheckedListBoxAddItems("item2");
myUserControl1.CheckedListBoxAddItems("item3");
}