Question ablout the vc++

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VisualC++

still I tried but not solve.
My exact thing is that I took win32 application as empty project and in that I created dialog box in that I put the button in that and I also generated the button click event in file.cpp
and on button click event I write the following

void file::OnBnClickedButton1()
{
    // TODO: Add your control notification handler code here
    MessageBox(L"Welcome to the Wonderful World of Visual C++ 2008");
    
}

But when I click the button the message box is not display So what is wrong I did not receive any error I tried for 2 days but not work proved me step by stem explanation and solustion.