This page is a quick description and demo of a couple of missing features in wine's window management when using the KDE window manager to manage wine windows. (Based on a CVS wine-20030510)
Firstly wine doesn't take any notice of maximum window sizes given to it in the response to WM_GETMINMAXINFO.
Secondly it doesn't implement the FlashWindow() method.
Not being much of a win32 programmer I've grabbed some PD create window demo code and added the features I wanted to test to it.
Source is available here and a binary (compiled with wine -- "c:\mingw\bin\gcc" -o flash.exe flash.c -mwindows) here