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 SetWindowsHookEx()

WH_GETMESSAGE // 모든 메시지

WH_KEYBOARD

HC_ACTION
HC_NOREMOVE

WH_CBT

HCBT_CREATEWND

CBT_CREATEWND

WH_CALLWNDPROC

UnhookWindowsHookEx()
CallNextHookEx()

HHOOK hKeyHook;

LRESULT CALLBACK KeyHookProc(int nCode, WPARAM wParam, LPARAM lParam)
{
    if (nCode >= 0) {
        if (wParam == VK_F2) {
            ...
        }
    }

    return CallNextHookEx(hKeyHook, nCode, wParam, lParam);
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{

    switch (iMessage) {

    case WM_CREATE:
        hWndMain = hWnd;
        hKeyHook = SetWindowsHookEx(WH_KEYBOARD, KeyHookProc, NULL, GetCurrentThreadId());
        return 0;

    case WM_DESTROY:
        UnhookWindowsHookEx(hKeyHook);
        PostQuitMessage(0);
        return 0;
...
    }

    return(DefWindowProc(hWnd ,iMessage, wParam, lParam));
}

HHOOK hCbtHook;

LRESULT CALLBACK CbtHookProc(int nCode,WPARAM wParam,LPARAM lParam)
{
    CBT_CREATEWND *pCbt;
    HWND hWnd;
    TCHAR szClassName[32];

    if (nCode == HCBT_CREATEWND) {
        hWnd = (HWND)wParam;
        pCbt = (CBT_CREATEWND *)lParam;

        if (HIWORD(pCbt->lpcs->lpszClass)) {
            lstrcpy(szClassName,pCbt->lpcs->lpszClass);
        } else {
            GlobalGetAtomName((ATOM)pCbt->lpcs->lpszClass, szClassName, 32);
        }

        if (lstrcmpi(szClassName, "#32770") == 0 && ((pCbt->lpcs->style & WS_CHILD) == 0)) {
            ...
        }
    }

    return CallNextHookEx(hCbtHook, nCode, wParam, lParam);
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT iMessage, WPARAM wParam, LPARAM lParam)
{
    switch (iMessage) {
    case WM_CREATE:
        hCbtHook = SetWindowsHookEx(WH_CBT, CbtHookProc, NULL, GetCurrentThreadId());
        return 0;

    case WM_DESTROY:
        UnhookWindowsHookEx(hCbtHook);
        PostQuitMessage(0);
        return 0;
...
    }

    return(DefWindowProc(hWnd, iMessage, wParam, lParam));
}

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http://dstein.egloos.com/1241819