This control's designer is open. To use the control, you must first close its designer (design window).

已打开了控件的设计器。若要使用该控件，必须先关闭其设计器(设计窗口)。

youdao

This control's designer is open. To use the control, you must first close its designer (design window).

已打开了控件的设计器。若要使用该控件，必须先关闭其设计器(设计窗口)。

youdao