问题
I want to disable the shadow effect on a specific aero window. All I have is the HWND of this window, is this possible?
回答1:
The shadow is defined by the theme currently used by the OS. You cannot disable it for one window only. You can change the theme and disable shadows, but it will be a system-wide change, not specific to one window.
In your case, one of the best approached would be creating your own window structure (starting from a borderless window) that will have similar transparency properties as Aero. This will not be an easy task, but certainly achievable.
来源：https://stackoverflow.com/questions/3696838/i-want-to-disable-the-shadow-effect-on-a-specific-aero-window