Creating a new form using code

static void CreateForm_usingCode(Args _args)
{
    Form form;
    FormRun formRun;
    Args args;
    FormBuildDesign formBuildDesign;
    FormBuildControl formBuildControl;
    FormBuildTabControl formBuildTabControl;
    FormBuildTabPageControl formBuildTabPageControl;
    FormBuildGridControl formBuildGridControl;
    FormBuildDatasource formBuildDatasource;
    FormBuildStringControl formString;
    ;
    form = new Form();
    formBuildDatasource = form.addDataSource(tableStr(CustTable));
    formBuildDesign = form.addDesign('design');
    formBuildTabControl = formBuildDesign.addControl(FormControlType::Tab, 'Tab1');
    formBuildTabPageControl = formBuildTabControl.addControl(
                                                    FormControlType::TabPage,  TabPage');
    formBuildGridControl = formBuildTabPageControl.addControl(FormControlType::Grid, 'Grid');
    formString = formBuildGridControl.addDataField(formBuildDatasource.id(),
                                                                                      fieldNum (CustTable,           Accountnum));
    formString.label("Customer Account");
    args = new Args();
    args.object(form);
    formRun = classFactory.formRunClass(args);
    formRun.init();
    formRun.run();
    formRun.wait();
}