how to deploy a user control as a webpart in SharePoint 2013.

this is my code:

         Control _myControl;
        protected override void CreateChildControls()
        {
            _myControl = this.Page.LoadControl("~/_CONTROLTEMPLATES/FolderName/FORM.ascx");
            this.Controls.Add(_myControl);
        }

same code worked for me in visual studio 2008 for SharePoint 2007. but now it is not working for VS2012 with SharePoint 2013.

Thanks in advance,

M.M