分类： C/C++
2009-12-18 10:31:20
class CWnd : public CCmdTarget
{
public: virtual BOOL PreCreateWindow(CREATESTRUCT& cs); virtual void PreSubclassWindow(); BOOL SubclassWindow(HWND hWnd); 
};BOOL CWnd::CreateEx(DWORD dwExStyle, LPCTSTR lpszClassName, LPCTSTR lpszWindowName, DWORD dwStyle, int x, int y, int nWidth, int nHeight, HWND hWndParent, HMENU nIDorHMenu, LPVOID lpParam) { // allow modification of several common create parameters CREATESTRUCT cs; cs.dwExStyle = dwExStyle; cs.lpszClass = lpszClassName; cs.lpszName = lpszWindowName; cs.style = dwStyle; cs.x = x; cs.y = y; cs.cx = nWidth; cs.cy = nHeight; cs.hwndParent = hWndParent; cs.hMenu = nIDorHMenu; cs.hInstance = AfxGetInstanceHandle(); cs.lpCreateParams = lpParam; if (!PreCreateWindow(cs))
{ PostNcDestroy(); return FALSE;
} AfxHookWindowCreate(this); HWND hWnd = ::CreateWindowEx(cs.dwExStyle, cs.lpszClass, cs.lpszName, cs.style, cs.x, cs.y, cs.cx, cs.cy, cs.hwndParent, cs.hMenu, cs.hInstance, cs.lpCreateParams); return TRUE;}// for child windowsBOOL CWnd::PreCreateWindow(CREATESTRUCT& cs){ if (cs.lpszClass == NULL) { // make sure the default window class is registered VERIFY(AfxDeferRegisterClass(AFX_WND_REG)); // no WNDCLASS provided - use child window default ASSERT(cs.style & WS_CHILD); cs.lpszClass = _afxWnd; } return TRUE;}// From VS Install PathVC98MFCSRCWINCORE.CPPBOOL CWnd::SubclassWindow(HWND hWnd){ if (!Attach(hWnd)) return FALSE; // allow any other subclassing to occur PreSubclassWindow(); // now hook into the AFX WndProc WNDPROC* lplpfn = GetSuperWndProcAddr(); WNDPROC oldWndProc = (WNDPROC)::SetWindowLong(hWnd, GWL_WNDPROC, (DWORD)AfxGetAfxWndProc()); ASSERT(oldWndProc != (WNDPROC)AfxGetAfxWndProc()); if (*lplpfn == NULL) *lplpfn = oldWndProc; // the first control of that type created#ifdef _DEBUG else if (*lplpfn != oldWndProc) { ::SetWindowLong(hWnd, GWL_WNDPROC, (DWORD)oldWndProc); }#endif return TRUE;}void CWnd::PreSubclassWindow(){ // no default processing}// From VS Install PathVC98MFCSRCWINCORE.CPPBOOL CWnd::CreateEx(){ // allow modification of several common create parameters if (!PreCreateWindow(cs)) { PostNcDestroy(); return FALSE; } AfxHookWindowCreate(this); HWND hWnd = ::CreateWindowEx(cs.dwExStyle, cs.lpszClass, cs.lpszName, cs.style, cs.x, cs.y, cs.cx, cs.cy, cs.hwndParent, cs.hMenu, cs.hInstance, cs.lpCreateParams); return TRUE;}// From VS Install PathVC98MFCSRCWINCORE.CPPvoid AFXAPI AfxHookWindowCreate(CWnd* pWnd){ if (pThreadState->m_hHookOldCbtFilter == NULL) { pThreadState->m_hHookOldCbtFilter = ::SetWindowsHookEx(WH_CBT, _AfxCbtFilterHook, NULL, ::GetCurrentThreadId()); if (pThreadState->m_hHookOldCbtFilter == NULL) AfxThrowMemoryException(); } }// From VS Install PathVC98MFCSRCWINCORE.CPP/**//**//**//////////////////////////////////////////////////////////////////////////////// Window creation hooksLRESULT CALLBACK_AfxCbtFilterHook(int code, WPARAM wParam, LPARAM lParam){ // connect the HWND to pWndInit pWndInit->Attach(hWnd); // allow other subclassing to occur first pWndInit->PreSubclassWindow(); { // subclass the window with standard AfxWndProc oldWndProc = (WNDPROC)SetWindowLong(hWnd, GWL_WNDPROC, (DWORD)afxWndProc); ASSERT(oldWndProc != NULL); *pOldWndProc = oldWndProc; } }