A
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GUEST, unregistred user!
The GetWindowLong function retrieves information about the specified window. <br>The function also retrieves the 32-bit(long) value <br>at the specified offset into the extra window memory of a window. <br>特别是at the specified offset into the extra window memory of a window这一句中的<br>the extra window memory of a window的确切意思是什么?<br>谢谢!<br>