I've recently tried to use dxwnd with Space Colony HD (http://www.gog.com/game/space_colony_hd) and it seems to work correctly except that the performance is very poor - I get only about 1fps and the mouse cursor sort of 'stutters' while the game is running.
I've tried playing with the settings a bit to get it to match http://www.gog.com/forum/space_colony_hd/windowed_mode, however this seems to be for an old version of dxwnd and the setting layout seems to have changed since then.
Please let me know if you want me to provide any debug info, logs etc.
I'll try to investigate, but in the meanwhile be aware that the most common cause of the problems you reported is the setting of the DirectX "Set AERO compatible mode" DxWnd flag. Uncheck this flag and see if things are turning better. Of course, in this way the aero desktop may be temporarily turned off, but you can't have everything .... ;)
That seems to have fixed it, thanks!
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