user.SetWindowLong(hWnd, WinUser.GWL_EXSTYLE, flags);
}
else {
flags |= WinUser.WS_EX_LAYERED;
user.SetWindowLong(hWnd, WinUser.GWL_EXSTYLE, flags);
user.SetLayeredWindowAttributes(hWnd, 0, level,
WinUser.LWA_ALPHA);
}
setForceHeavyweightPopups(w, alpha != 1f);
storeAlpha(w, level);
}