VC in the call cmd command four ways _cmd

1. System method: Prototype:

int __cdecl System (const char *);

For example:

System ("ipconfig");

2. WinExec method: The WinExec method has one more window parameter than the system method:

Prototype:

UINT winexec (
  lpcstr lpcmdline,
  UINT ucmdshow
);

For example:

WinExec ("ipconfig", sw_show);

Parameters can be: sw_show,,sw_showmaximized,sw_showminimized and so on, the overall usage is similar.

3. ShellExecute method: This method is mainly used for the operation of Open,edit,find and other methods:

Prototype:

HINSTANCE ShellExecute (      
    hwnd hwnd,
    LPCTSTR lpoperation,
    lpctstr lpfile,
    lpctstr lpparameters,
    LPCTSTR lpdirectory,
    INT nshowcmd
);

For example:

ShellExecute (NULL, "open", "Abc.xls", null,null,sw_hide);//Open Default path Abc.xls file

4. Callable method of invocation: This method is more complicated by creating a new process to simulate the cmd command line, rendering the write command line and echoing through the pipe.
For example:

void Ctestmfcdlg::onok () {//Todo:add extra validation here security_attributes sa;

    HANDLE Hread,hwrite;
    sa.nlength = sizeof (security_attributes);
    Sa.lpsecuritydescriptor = NULL;

    Sa.binherithandle = TRUE; if (!
        CreatePipe (&hread,&hwrite,&sa,0)) {MessageBox ("CreatePipe Failed");
    Return
    } startupinfo si;

    Process_information Pi;
    ZeroMemory (&si,sizeof (startupinfo));
    SI.CB = sizeof (STARTUPINFO);
    Getstartupinfo (&SI);
    Si.hstderror = Hwrite;
    Si.hstdoutput = Hwrite;
    Si.wshowwindow = Sw_hide; Si.dwflags = Startf_usestdhandles |

    Startf_useshowwindow;
    Char cmdline[200];
    CString Tmp,stredit2;
    GetDlgItemText (IDC_EDIT_CMD,STREDIT2); Tmp.
    Format ("cmd/c%s", stredit2);

    sprintf (CmdLine, "%s", TMP); if (! CreateProcess (NULL,CMDLINE,NULL,NULL,TRUE,NULL,NULL,NULL,&SI,&PI)) {MessageBox ("CreateProcess failed!
        ");
    Return } CloseHandle (HwriTE);
    Char buffer[4096] = {0};
    CString Stroutput;

    DWORD Bytesread;
        while (1) {if (NULL = ReadFile (hread,buffer,4095,&bytesread,null)) {break;
        } Stroutput + = buffer;
        Setdlgitemtext (Idc_edit_text,stroutput);
        UpdateWindow ();
    Sleep (1000);
} closehandle (Hread);
 }

The above is in an MFC click on the OnOK button, the Idc_edit_cmd edit box in the command to execute, and the 1 seconds in the cmd command echo promised to the Idc_edit_text edit box implementation.