In this tutorial. I'll show you how to change any window programs title using VC++.

This's the code:
#include "stdafx.h"
#include "windows.h"

int main(int argc, char* argv[])
{
 HWND hwnd = FindWindow(NULL, TEXT("your title here"));
 SetWindowText(hwnd, TEXT("ABC"));
 return 0;
}
Explain this code:

To run this code you need to add #include "windows.h"
HWND hwnd = FindWindow(NULL, TEXT("Your Title Here"));
This code show will find your program running and return it into HWND. From this you can get Process ID, and do many thing as change the title.

Other way you can get HWND from class name:
HWND hwnd = FindWindow("Your class name", 0);
* How to get class name of program: You can use Tool Spe++ on your Microsoft Virtual Tools (include in VC++ setup packet)

So, You have HWND right now. And put code
SetWindowText(hwnd, TEXT("ABC"));
to change the title.
Done!