uuSpy tool is more like Spy++, but added the function of PasswordSpy and Get IE's HTML. With uuSpy you can understand the window layout of a running application or identify a certain window message that causes a bug. Also you can output style/exstyle of a selected window or set something to it.
* uuSpy can output style/exstyle of selected window or reset it like:
nStyle = WS_OVERLAPPED | WS_POPUP | WS_VISIBLE | WS_CL ...