про классы окон, и дополнительное место для экземпляра окна

[Пепел Феникса]

typedef struct {
UINT cbSize;
UINT style;
WNDPROC lpfnWndProc;
int cbClsExtra;
int cbWndExtra;
HINSTANCE hInstance;
HICON hIcon;
HCURSOR hCursor;
HBRUSH hbrBackground;
LPCTSTR lpszMenuName;
LPCTSTR lpszClassName;
HICON hIconSm;
} WNDCLASSEX, *PWNDCLASSEX;

структура думаю всем известна

cbClsExtra int
Specifies the number of extra bytes to allocate following the window-class structure. The system initializes the bytes to zero.
cbWndExtra int
Specifies the number of extra bytes to allocate following the window instance. The system initializes the bytes to zero. If an application uses WNDCLASSEX to register a dialog box created by using the CLASS directive in the resource file, it must set this member to DLGWINDOWEXTRA.

вопрос как использовать это место?
(как его получить(указатель))

заранее спасибо

[ds.Dante]

http://support.microsoft.com/kb/11606

INFO: Use of Allocations w/ cbClsExtra & cbWndExtra in Windows

- cbClsExtra: Extra bytes to allocate to CLASS data structure in USER.EXE local heap when RegisterClass() is called. Accessed by Get/Set CLASS Word/Long ();.

- cbWndExtra: Extra bytes to allocate to WND data structure in USER.EXE local heap when CreateWindow() is called. Accessed by Get/Set WND Word/Long ();.

You can use these structures at your discretion and for any purpose you desire.

Т. е. через функции типа GetClassLong().


З. Ы. Вот, пример нашёл: http://blogs.msdn.com/oldnewthing/ar.../13/55662.aspx

[Пепел Феникса]

спасибо
+1 вам(или сколько я там дам)