Mfc a dialog calls B dialog function and passes parameters

A.cpp

void A::OnBnClickedButton1()
{
    
    // A dialog class ：Copen.cpp 
    B* m_B= (B*)GetParent();
    m_B->TcpB(_T("A window "), _T(" call B window "));
}

B.h

public
	void B::TcpB(CString Name, CString Data)

B.cpp

void B::TcpB(CString Name, CString Data)
{
    
    if (MessageBox(Data, Name, MB_YESNO | MB_ICONWARNING) == IDNO)
        return;
}