Question

Let’s say, I have 2 WinForms here, Form1 and Form2 respectively. And then I made Form1 hidden. I wonder how I could write the code in Form2 to detect if Form1 object is still running or not.

I was trying to use Form1.ActiveForm but it seems to give me NULL value. Any better ideas? Thanks.

Answer 1

You could use my method to get any active forms:

public static Form IsFormAlreadyOpen(Type FormType)
{
   foreach (Form OpenForm in Application.OpenForms)
   {
      if (OpenForm.GetType() == FormType)
         return OpenForm;
   }

   return null;
}