VS2013 中 CString类型转换为LPCSTR类型

　　　　HWND hWnd = ::FindWindow(NULL, L"XXXXXXX");
	if (hWnd != NULL)
	{
		DWORD dwReadBytes;
		unsigned char *lpbuffer = (unsigned char *)malloc(10 * 1024 * 1024);;
		
		USES_CONVERSION;
		LPCSTR path = (LPCSTR)T2A(m_strDescPath); //m_strDescPath为一edit组件的成员变量

		HFILE splhandle = _lopen(path, 0);
		dwReadBytes = _lread(splhandle, lpbuffer, 10 * 1024 * 1024);

		COPYDATASTRUCT cpd; /*给COPYDATASTRUCT结构赋值*/
							//cpd.dwData = 1;                                                                                                         //标志发送字符串
							//cpd.cbData = strlen("字符串")+1;
							//cpd.lpData = "字符串";
							//::SendMessage(hWnd,WM_COPYDATA,NULL,(LPARAM)&cpd);//发送！

		cpd.dwData = 1; //标志发送CString类型
		cpd.cbData = dwReadBytes;
		cpd.lpData = lpbuffer;
		::SendMessage(hWnd, WM_COPYDATA, NULL, (LPARAM)&cpd); //发送！
	}