C++ 멤버 함수 주석은 .h에 아니면 .cpp에 작성해야 하나요?

Doxygen으로 source code를 돌리려구 합니다.
그런데 C++ 멤버 함수에 대한 주석 있잖습니까?

/**
 * WM_CREATE message handler.
 *
 * @brief 
 *
 * @param uMsg		This parameter identifies the message.
 * @param wParam 	This parameter is not used.
 * @param lParam 	Pointer to a CREATESTRUCT structure that contains 
 * 					information about the window being created.
 * @param bHandled	This This is a flag to indicate whether it handled 
 * 					the message.
 *
 * @return result	If a application this message, it should return 
 * 					zero to continue create of the window. If the
 * 					application return -1, the window is destroyed and
 * 					CreateWindowEx or CreateWindow function returns
 * 					a NULL handle.
 */
LRESULT CMainFrame::OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);

이거를 .h에 작성을 해주는게 좋나요 아니면 .cpp에 작성하는게 좋을까요?