Comments (3)
halx99
commented on August 16, 2024
Acording to CS_DROPSHADOW referenced from https://docs.microsoft.com/en-us/windows/win32/winmsg/window-class-styles , change HWND_NOTOPMOST to HWND_TOPMOST can solve this issue.
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halx99
commented on August 16, 2024
Update: 如果是双显示器，双击对话框，阴影只会在主显示器消失，将对话框拖入副显示器有阴影，再拖回主显示器无阴影，如此往复 【神奇】
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halx99
commented on August 16, 2024
最终应当使用DWM实现
- 严格按照微软官方文档来
- 非Top-level窗口不适合使用CS_DROPSHADOW
- CS_DRAWSHADOW只适用于短生命周期的top-level窗口，例如弹出菜单
- 目前DWM阴影和Layered不兼容，如果同时开启，切后台回前台，阴影会消失
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