Call a parent functions from child form

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In order to call a parent function from a child form you have to pass the form1 instance to form2 in the constructor.

Form1:

namespace CallingForm

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

Form2 tmp = new Form2(this);

tmp.ShowDialog();

}

internal void msg()

{

MessageBox.Show("Hello from parent form");

}

}

}

Form 2:

namespace CallingForm

{

public partial class Form2 : Form

{

private Form1 frmParent;

public Form2(Form1 frm1)

{

InitializeComponent();

frmParent = frm1;

}

private void button1_Click(object sender, EventArgs e)

{

frmParent.msg();

}

}

}

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