Russell,
here it is the whole code you needed:

#include "stdafx.h"
#include <windows.h>
#include <stdio.h>

int APIENTRY _tWinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPTSTR    lpCmdLine,
                     int       nCmdShow)
{
	WIN32_FIND_DATA FileData; 
	HANDLE hSearch; 

	hSearch = FindFirstFile("c:\\TEST\\test.dbf", &FileData); // CHeck if the file exists
	if (hSearch != INVALID_HANDLE_VALUE) 
	   { 
                // File exists
                // Copy file c:\test\dbf to c:\test\test1.dbf
                // and we don't want the function to fail if the file TEST1.DBF exists
		CopyFile("c:\\TEST\\test.dbf", "c:\\TEST\\test1.dbf", FALSE); 

                // Close handle to file
		FindClose(hSearch);
	   }
	   return 0;
}

The stdafx.h contains:

#define WIN32_LEAN_AND_MEAN		// Exclude rarely-used stuff from Windows headers
// Windows Header Files:
#include <windows.h>
// C RunTime Header Files
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <tchar.h>

This is a modified code from MSDN library.
This is a very simple code, no way to specify a file name and path as a parameters. but you can modify it.