Hi there, when I use the three lines of code from the FAQ to customise the application icon: HICON icon{ LoadIcon((HINSTANCE)&__ImageBase, MAKEINTRESOURCE(MAINICON)) }; SendMessage((HWND)QueryService()->getWindow()->QueryService()->getHandle(), WM_SETICON, ICON_BIG, (LPARAM)icon); SendMessage((HWND)QueryService()->getWindow()->QueryService()->getHandle(), WM_SETICON, ICON_SMALL, (LPARAM)icon); I get the errors "pointer to incomplete class type is not allowed" and "use of undefined type 'nitisa::IWindow'", both referring to the QueryService call. What am I missing? Thanks Mark

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