Copy file small problem

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C++14

I search files use

SearchFiles("C:\\Users\\Admin\\Desktop\\*.txt", DoSomething, TRUE);

What I have tried:

void DoSomething(LPCTSTR lpszFileName)
{
	string z = random_string(5);
LPTSTR x = new TCHAR[z.size() + 1];
    //MessageBox(NULL, lpszFileName, "Find File", MB_OK | MB_APPLMODAL);
	CopyFile(lpszFileName,	strcpy(x, z.c_str()),true);
	MessageBox(NULL, strcpy(x, z.c_str()), "Find File", MB_OK | MB_APPLMODAL);
}

CopyFile is

BOOL WINAPI CopyFile(LPCTSTR lpExistingFileName,LPCTSTR lpNewFileName,BOOL bFailIfExists);

It great work - copy to my program random name files
1)But i wont using original name files to my prog!

CopyFile(lpszFileName,lpszFileName,true);

so it dont copy idk why!