What is wrong with this code?

Question

Hello,

I'm learning C++ but i'm not sure what it wrong with the following code:

#include <iostream>
#include <string>
using namespace std;

string docname("Untitled");

private: System::Void newToolStripMenuItem_Click(System::Object^  sender, System::EventArgs^  e) 
		 {
			 MessageBox::Show("Do you want to save your changes to " + docname + "?", "Save Changes?");
		 }

This is a windows forms application and I am trying to get the docname string to show in the messagebox. I get the following error:

***Error    1    error C2665: 'System::Windows::Forms::MessageBox::Show' : none of the 21 overloads could convert all the argument types***


Thanks,

Steve

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Thanks, Steve