DWMWA_USE_HOSTBACKDROPBRUSH constant
int
const DWMWA_USE_HOSTBACKDROPBRUSH
Use with DwmSetWindowAttribute. Enables a non-UWP window to use host backdrop brushes. If this flag is set, then a Win32 app that calls Windows::UI::Composition APIs can build transparency effects using the host backdrop brush (see Compositor.CreateHostBackdropBrush). The retrieved value is of type BOOL. TRUE to enable host backdrop brushes for the window; otherwise, FALSE. (Supported on Windows 11 and above.)
Implementation
static const DWMWA_USE_HOSTBACKDROPBRUSH = 17;