How to achieve fully transparency in ClientRect area?

[LigaLiao]

In the case of using MFC：SetLayeredWindowAttributes(RGB(255, 255, 255), 0, LWA_COLORKEY);
but, in the WinUI, This doesn't work.

[btueffers]

Hi @LigaLiao, transparent windows are not currently supported. If you'd like to make a feature request for this please create a new Issue!