通过登陆验证,进入mdi窗口,打开一个子窗口,出现错误:
cannot create form.NO MDI frorms are currently active.登陆成功后
Application.CreateForm(Tmain_form, main_form); main_form.Show;
点击main窗口里的菜单提示错误
cannot create form.NO MDI frorms are currently active.登陆成功后
Application.CreateForm(Tmain_form, main_form); main_form.Show;
点击main窗口里的菜单提示错误
把Application.CreateForm(Tmain_form, main_form);去掉