[template
BOOL CWindowImplBaseT< TBase, TWinTraits >::SubclassWindow(HWND hWnd)
{
BOOL result;
ATLASSUME(m_hWnd == NULL);
ATLASSERT(::IsWindow(hWnd));
// Allocate the thunk structure here, where we can fail gracefully.
//初始化this 指针与winProc
result = m_thunk.Init(GetWindowProc(), this);
if (result == FALSE)
{
return FALSE;
}
WNDPROC pProc = m_thunk.GetWNDPROC();
//取得要subclassWindwo的WinProc
WNDPROC pfnWndProc = (WNDPROC)::SetWindowLongPtr(hWnd, GWLP_WNDPROC, (LONG_PTR)pProc);
if(pfnWndProc == NULL)
return FALSE;
//把取得的Windproc 去sub上
m_pfnSuperWindowProc = pfnWndProc;
//并把本身的m_hWnd 换成要sub上的hWnd
m_hWnd = hWnd;
return TRUE;
}
从上面分析可以看出做的步骤有:
1.sub资源上的wndProc
2.sub资源上的hWnd
