Create a new form instance inside parent with the ability to access the parent form

Question

I tried to create a new form inside the Parent. I set FormBorderStyle to none.

When I am adjusting MDIParent to the myForm, it gave me a sick looking error like this:

System.ArgumentException : The given Form is not being recalled as a MdiContainer.

This is my code for creating a new Windows Form.

FrmHome myForm = new FrmHome ();
myForm.TopLevel = false;
pnlContainer.Controls.Add(myForm);
myForm.Show();

Answer 1

The Mdi parent must have it's IsMdiContainer property set to True.

You can set this property at design time in your main form or runtime :-

Form1 f1 = new Form1();
f1.MdiParent = this;
f1.Show();

Form1 is the name of the form that you want to show.

Form.IsMdiContainer Property

Property Value Boolean true if the form is a container for MDI child forms; otherwise, false. The default is false.