Disabling the Close-Button temporarily

Question

I need to disable just the close button (minimize and maximize should be allowed) temporarily.

Every solution I\'ve tried disables all the buttons

Answer 1

isprocessing = true;
form.FormClosing += new FormClosingEventHandler(form_cancel); 
private void form_cancel(object sender, FormClosingEventArgs e)
{
   if (isprocessing)
   {
      e.Cancel = true;  //disables the form close when processing is true
   }
   else
   {
      e.Cancel = false; //enables it later when processing is set to false at some point 
    }
}

This worked for me