   How do I work with WIndows Forms in WPF?
  How do I work with WIndows Forms in WPF?In my WPF program I created a Windows Form class.In this Form, I placed an OK button and I went into the properties of the button and set the DialogResult to OK.Now, I am calling this Dialog (Window Form) from the MainWindow.xaml.cs:DialogResult dres;dres = form.ShowDialog();if (dres != DialogResult.OK) return;The compiler is complaining:Error3'System.Nullable<bool>' does not contain a definition for 'OK' and no extension method 'OK' accepting a first argument of type 'System.Nullable<bool>' could be found (are you missing a using directive or an assembly reference?)
  It looks like it is referencing the WPF DialogResult instead of the Winform DialogResult.  Have you tried something like this?System.Windows.Forms.DialogResult dres;dres = form.ShowDialog();if (dres != System.Windows.Forms.DialogResult.OK) return;