Question

I’d like to get the handle of my form from a different class(probably thread). I want to do it the way I do invoke

    public int GetHandle     {         get         {             if (this.InvokeRequired)             {                 this.Invoke((MethodInvoker)delegate                 {                     return this.Handle.ToInt32();                 });             }         }     } 

I get an error ‘Since ‘System.Windows.Forms.MethodInvoker’ returns void, a return keyword must not be followed by an object expression’

If i don’t use the invoke,I get an exception that I’m not calling the method from the current thread.

Answer 1

You can invoke any delegate, not just MethodInvoker. Try this:

public int GetHandle     {         get         {             if (this.InvokeRequired)             {                 return (int)this.Invoke((GetHandleDelegate)delegate                 {                     return this.Handle.ToInt32();                 });             }             return this.Handle.ToInt32();         }     } private delegate int GetHandleDelegate();