请教shfileoperation()问题

[hueager]

下面这段程序中，char 型可以但CString的却不可已为什么？

int nOk;
//CString strSrc,strDst;
//strSrc="C:\\My Documents\\hyg.txt\0";
//strDst="C:\\My Documents\\hyg1.txt\0";
char strSrc[]="C:\\My Documents\\hyg.txt\0";

//可以改变源路径
char strDst[]="C:\\My Documents\\hyg1.txt\0";

//设置目的路径
char strTitle[]="File copying";
//进度题头
SHFILEOPSTRUCT FileOp;
FileOp.hwnd=m_hWnd;
FileOp.wFunc=FO_COPY;
//执行文件拷贝
FileOp.pFrom=strSrc;
FileOp.pTo=strDst;
FileOp.fFlags=FOF_NOCONFIRMATION|FOF_NOCONFIRMMKDIR;
FileOp.hNameMappings=NULL;
FileOp.lpszProgressTitle=strTitle;

nOk=SHFileOperation(& FileOp);
if(nOk)
TRACE("There is an error: %d\n",nOk);
else
TRACE("SHFileOperation finished successfully\n");

if(FileOp.fAnyOperationsAborted)
TRACE("Operation was aborted!\n");