How to use 2 command in sytem() function ?

**mmc01** · February 7th, 2013 10:29 PM

I want to run Unhidden.exe in drive N: and send char to that program. I use function like this

Code:

system("N:/Unhidden.exe");

it can open Unhidden.exe but it run in visual studio 2010\Projects\ . I try to use command N: and Unhidden.exe in cmd it can run in drive N: . So I try to use function like this

system("N:");
system("Unhidden.exe");

but it not found Unhidden.exe . How to use 2 command in sytem() function ?

**VictorN** · February 8th, 2013 01:09 AM

Use CreateProcess API instead of system.

**mmc01** · February 8th, 2013 03:20 AM

How to use CreateProcess . I read example and try to use the function like this

Code:

DWORD WINAPI hidden_file(LPVOID lp)
{
	STARTUPINFO si;
    PROCESS_INFORMATION pi;

    ZeroMemory( &si, sizeof(si) );
    si.cb = sizeof(si);
    ZeroMemory( &pi, sizeof(pi) );

LPTSTR szCmdline1 = _tcsdup(TEXT("N:/Unhidden.exe"));
	CreateProcess(NULL, szCmdline1,  
		NULL,           // Process handle not inheritable
        NULL,           // Thread handle not inheritable
        FALSE,          // Set handle inheritance to FALSE
        0,              // No creation flags
        NULL,           // Use parent's environment block
        NULL,           // Use parent's starting directory 
        &si,            // Pointer to STARTUPINFO structure
        &pi );


   return 0;
}

but when I send key Y with this code it run in visual studio 2010\Projects\

Code:

    ir[0].EventType = KEY_EVENT;
    ir[0].Event.KeyEvent.bKeyDown = TRUE;
    ir[0].Event.KeyEvent.dwControlKeyState = 0;
    ir[0].Event.KeyEvent.uChar.UnicodeChar = 'y';
    ir[0].Event.KeyEvent.wRepeatCount = 1;
    ir[0].Event.KeyEvent.wVirtualKeyCode = 'Y';
    ir[0].Event.KeyEvent.wVirtualScanCode = MapVirtualKey('Y', MAPVK_VK_TO_VSC);

And if I use this code it not show anything in command window.

Code:

LPTSTR szCmdline1 = _tcsdup(TEXT("N:"));
	CreateProcess(NULL, szCmdline1,  
		NULL,           // Process handle not inheritable
        NULL,           // Thread handle not inheritable
        FALSE,          // Set handle inheritance to FALSE
        0,              // No creation flags
        NULL,           // Use parent's environment block
        NULL,           // Use parent's starting directory 
        &si,            // Pointer to STARTUPINFO structure
        &pi );

	LPTSTR szCmdline2 = _tcsdup(TEXT("Unhidden.exe"));
	CreateProcess(NULL, szCmdline2,  
		NULL,           // Process handle not inheritable
        NULL,           // Thread handle not inheritable
        FALSE,          // Set handle inheritance to FALSE
        0,              // No creation flags
        NULL,           // Use parent's environment block
        NULL,           // Use parent's starting directory 
        &si,            // Pointer to STARTUPINFO structure
        &pi );

   return 0;
}

**VictorN** · February 8th, 2013 03:41 AM

Originally Posted by mmc01

How to use CreateProcess . I read example and try to use the function like this

Code:

DWORD WINAPI hidden_file(LPVOID lp)
{
	STARTUPINFO si;
    PROCESS_INFORMATION pi;

    ZeroMemory( &si, sizeof(si) );
    si.cb = sizeof(si);
    ZeroMemory( &pi, sizeof(pi) );

LPTSTR szCmdline1 = _tcsdup(TEXT("N:/Unhidden.exe"));
	CreateProcess(NULL, szCmdline1,  
		NULL,           // Process handle not inheritable
        NULL,           // Thread handle not inheritable
        FALSE,          // Set handle inheritance to FALSE
        0,              // No creation flags
        NULL,           // Use parent's environment block
        NULL,           // Use parent's starting directory 
        &si,            // Pointer to STARTUPINFO structure
        &pi );


   return 0;
}

Why do you use _tcsdup?

You don't need to duplicate this string.
But if you do want to call _tcsdup then you must somewhere call

Code:

free(szCmdline1);

to avoid memory leaks!
Second: you don't check the return value of CreateProcess. Thus you don't know whether it failed or succeeded. And if it failed then all your other attempts to work with the Unhidden.exe do not make any sense!

Originally Posted by mmc01

but when I send key Y with this code it run in visual studio 2010\Projects\

Code:

    ir[0].EventType = KEY_EVENT;
    ir[0].Event.KeyEvent.bKeyDown = TRUE;
    ir[0].Event.KeyEvent.dwControlKeyState = 0;
    ir[0].Event.KeyEvent.uChar.UnicodeChar = 'y';
    ir[0].Event.KeyEvent.wRepeatCount = 1;
    ir[0].Event.KeyEvent.wVirtualKeyCode = 'Y';
    ir[0].Event.KeyEvent.wVirtualScanCode = MapVirtualKey('Y', MAPVK_VK_TO_VSC);

[/CODE]

Where do you send key Y to? You didn't write anything about sending keys...
And what is ir[...]?

Originally Posted by mmc01

And if I use this code it not show anything in command window.

Code: