用vb2013写的，父窗体中点击不同按钮，显示不同子窗体。图中project按钮在父窗体，背景色为红色，位于一个panel中，panel的borderstyle已经设为none；子窗体的formborderstyle也已设为none，子窗体最上部为一个panel，背景色为红色。想达到的效果是父窗体中的按钮与子 ...

I would like to have a main form that has a 'window' where the specific UI form for the user-selected operation will be displayed. I don't particularly want to use a separate form -- I want the main ...