Change window type (DWSTYLE in WinAPI)

Hello. I has had created some window, like this

Code:

HWND hWnd = CreateWindow(
        szWindowClass,
        szTitle,
        [B]WS_OVERLAPPEDWINDOW|WS_MINIMIZE,[/B]
        CW_USEDEFAULT, CW_USEDEFAULT,
        100, 100,
        NULL,
        NULL,
        hInstance,
        NULL
    );

I am interested to change dynamically (after some event, like mouse over) the window style.
My goal is to make window, which shows minimalize tray onli when mouse is over it. I hope this is possible without some hellcomplicated code. I am C++ beginner which have problems to declare array

 

you can ask on Professional Win32 api newsgroup :
where it has often been discussed

 

news://nntp.aioe.org/comp.os.ms-windows.programmer.win32