针针扎 (Live) 辛若天 专辑：江湖新能量 语种：国语 流派：Pop 唱片公司：梦响强音
I\'m trying to place a popup window开发者_如何学Go (TitleWindow) in the middle of the main application window. how do i set the coordinates of my popup window to be of the main application window?
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