c# - accessing a non-static member error while using form/controls from static method -

in project of mine have code following in class i've written named keyboardhook...

    private static intptr keyboardhookid = intptr.zero;      public static intptr hookcallback(int ncode, intptr wparam, intptr lparam)     {         if (ncode >= 0 && wparam == (intptr)wm_keydown)         {             int vkcode = marshal.readint32(lparam);              //update ui here...         }         return callnexthookex(keyboardhookid, ncode, wparam, lparam);      } 

i'd update ui statement like

    form1.label1.text = vkcode.tostring(); 

...but causes problem c# compiler; namely accessing non-static member.
need create reference form1 object,ie.

            application.run(new form1()); 

what do?

in solutionexplorer open program.cs , change code there following

    static class program {     public static form1 mainform = null;     /// <summary>     /// main entry point application.     /// </summary>     [stathread]     static void main()     {         application.enablevisualstyles();         application.setcompatibletextrenderingdefault(false);         mainform = new form1();         application.run(mainform);     } } 

here instance of form1 class created , started application.run command. note mainform initialized null in line 3 , not:

public static form1 mainform = new form1(); 

this because application.setcompatibletextrenderingdefault() method must called before first iwin32window object created in application, or invalidoperationexception thrown.