Displaying msgbox to close the opened child form.

Question

Hi,

I m having 12 forms in my application. I want to display a message box asking the user to close the existing opened child form before opening other.

I had tried the following the code:

<pre lang="cs">

Form curfrm;
String a = " Please Close the other open windows";

private void admissionForm1ToolStripMenuItem_Click(object sender, EventArgs e)

       {

           adfrm1 af1 = new adfrm1(null);

           if (curfrm != null)

           {

               MessageBox.Show(a);

               return;

           }

           else

           {

               curfrm = af1;

               af1.MdiParent = this;

               af1.Show();

           }</pre>

This doesn't allow me to open the other forms after closing the child form.

Thanks.