Thread: [Q]Dos in fullscreen

i dont know how you could do it with source code,
but you can do it by pressing Alt-Enter, give them the option
to do that?

that is assumming you mean the command prompt, because
dos would be an operating system on its on and last time i
seen dos it already took the full screen.

Code:

// Simulate ALT-ENTER keystrokes
void AltEnter()
{
    // NOTE: This method only works if the console window has the keyboard 
    //       focus and the user isn't hitting keys on the keyboard.
    SetForegroundWindow(GetConsoleWindow()); 
    keybd_event(VK_MENU, MapVirtualKey(VK_MENU, 0), 0, 0); 
    keybd_event(VK_RETURN, MapVirtualKey(VK_RETURN, 0), 0, 0); 
    keybd_event(VK_RETURN, MapVirtualKey(VK_RETURN, 0), KEYEVENTF_KEYUP, 0); 
    keybd_event(VK_MENU, MapVirtualKey(VK_MENU, 0), KEYEVENTF_KEYUP, 0); 
}//AltEnter

If you're running on an NT based verison of Windows, here is the best way to do it:

Code:

/*-----------------------------------------------------------------------------
NT_SetConsoleDisplayMode - Set the console display to fullscreen or windowed.

Parameters:
    hOutputHandle - Output handle of cosole, usually 
                        "GetStdHandle(STD_OUTPUT_HANDLE)"
    dwNewMode - 0=windowed, 1=fullscreen

Returns Values: 
    TRUE if successful, otherwise FALSE is returned. Call GetLastError() for 
    extened information.

Remarks:
    This only works on NT based versions of Windows.

    If dwNewMode is anything other than 0 or 1, FALSE is returned and 
    GetLastError() returns ERROR_INVALID_PARAMETER.
    
    If dwNewMode specfies the current mode, FALSE is returned and 
    GetLastError() returns ERROR_INVALID_PARAMETER. Use the (documented) 
    function GetConsoleDisplayMode() to determine the current display mode.
-----------------------------------------------------------------------------*/
BOOL NT_SetConsoleDisplayMode(HANDLE hOutputHandle, DWORD dwNewMode)
{
    typedef BOOL (WINAPI *SCDMProc_t) (HANDLE, DWORD, LPDWORD);
    SCDMProc_t SetConsoleDisplayMode;
    HMODULE hKernel32;
    BOOL bFreeLib = FALSE, ret;
    const char KERNEL32_NAME[] = "kernel32.dll";

    hKernel32 = GetModuleHandleA(KERNEL32_NAME);
    if (hKernel32 == NULL)
    {
        hKernel32 = LoadLibraryA(KERNEL32_NAME);
        if (hKernel32 == NULL)
            return FALSE;

        bFreeLib = true;
    }//if

    SetConsoleDisplayMode = 
        (SCDMProc_t)GetProcAddress(hKernel32, "SetConsoleDisplayMode");
    if (SetConsoleDisplayMode == NULL)
    {
        SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
        ret = FALSE;
    }//if
    else
    {
        DWORD dummy;
        ret = SetConsoleDisplayMode(hOutputHandle, dwNewMode, &dummy);
    }//else
        
    if (bFreeLib)
        FreeLibrary(hKernel32);

    return ret;
}//NT_SetConsoleDisplayMode

gg

if I use the first one it sais: 47 `GetConsoleWindow' undeclared (first use this function)
and if I use the second above int main(); it doesn't do anything. Maybe I did something wrong, I don't know but thanks for trying.

This has been working ok for me on XP. Haven't tried backward compatability:

Code:

/* set screen mode, b == TRUE -> fullscreen, b == FALSE -> windowed */
BOOL setScreenMode( BOOL b )
{
	COORD coord;
	BOOL success = 0;
	
	HANDLE hConsole = GetStdHandle( STD_OUTPUT_HANDLE );
	if(hConsole == NULL || hConsole == INVALID_HANDLE_VALUE )
		return success;
	
	if(b)
		success = SetConsoleDisplayMode( hConsole, CONSOLE_FULLSCREEN_MODE, &coord);
	else
		success = SetConsoleDisplayMode( hConsole, CONSOLE_WINDOWED_MODE, &coord);
		
	return success;
}

Scratch all that and get a DOS-based compiler if you really want DOS. I don't know why you would, but here is a link that will lead you to just that.

Get DJGPP from here: www.delorie.com

1. Yes I had include <windows.h> and it still doesn't work.
2. If I use Br5an's code above int main(); it sais In function `BOOL setScreenMode(BOOL)': `CONSOLE_FULLSCREEN_MODE' undeclared (first use this function)
(Each undeclared identifier is reported only once for each function it appears in.)
`SetConsoleDisplayMode' undeclared (first use this function)
`CONSOLE_WINDOWED_MODE' undeclared (first use this function)
Thanks for trying but I don't understand anything of it (why it doesn't work, etc.)
3. I mean Win32 Console not DOS.
It would be verry helpfull if someone could help me with my error's or something like that, till now on I don't get anything to work, please help me.

Originally Posted by Br5an

Just a follow up with example, please pardon that I didn't change printf's to cout, ect... The problem is probably with _WIN32_WINNT, I put a little comment in the code. Works with DevC++ 4.9.9.2 (MinGW compiler) on XP for sure.

Edit: _WIN32_WINNT 0x0501 should also work. I noticed after looking in wincon.h

Code:

#include <stdio.h>

/* Must be running a 'new' enough version of Windows or it's not
   going to work. How 'new' 0x0502 is I don't know off hand. */
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0502
#endif

#include <windows.h>

#define FULL_SCREEN TRUE
#define WINDOWED FALSE

/* set screen mode, b == TRUE -> fullscreen, b == FALSE -> windowed */
BOOL setScreenMode( BOOL b )
{
	COORD coord;
	BOOL success = 0;
	
	HANDLE hConsole = GetStdHandle( STD_OUTPUT_HANDLE );
	if(hConsole == NULL || hConsole == INVALID_HANDLE_VALUE )
		return success;
	
	if(b)
		success = SetConsoleDisplayMode( hConsole, CONSOLE_FULLSCREEN_MODE, &coord);
	else
		success = SetConsoleDisplayMode( hConsole, CONSOLE_WINDOWED_MODE, &coord);
		
	return success;
}

int main( )
{
	BOOL mode;
	mode = setScreenMode( FULL_SCREEN );
	if(mode)
		printf("Full screen mode set");
	else
		printf("Full screen mode failed");
		
	getchar( );
		
	mode = setScreenMode( WINDOWED );
	if(mode)
		printf("Windowed screen mode set");
	else
		printf("Windowed screen mode failed");
		
	getchar( );
	
	return(0);
}

_WIN32_NT 0x502 means Windows Server 2003. _WIN_NT 0x501 means Windows XP. This code can also be run on _WIN32_NT 0x500 (Windows 2000. MSDN tries to screw you up by saying SetConsoleDisplayMode won't work there. It just needs some defining). However, one thing I don't get is that _WIN32_NT not defined thing. In all systems I have compiled things I get _WIN32 defined but not _WIN32_WINDOWS or _WIN32_NT. Anyway, here's what it needs to work with systems >= Windows 2000.

Code:

#include <stdio.h>

#ifndef _WIN32_NT
#define _WIN32_NT 0x500
#endif

#include <windows.h>

typedef BOOL (WINAPI *SetConsoleDisplayModeProc) (HANDLE, DWORD, PCOORD);
HMODULE dll = LoadLibrary("kernel32.dll");
SetConsoleDisplayModeProc SetConsoleDisplayMode = (SetConsoleDisplayModeProc)GetProcAddress(dll, "SetConsoleDisplayMode");

#define FULL_SCREEN TRUE
#define WINDOWED FALSE

After that it's like in the example. Works perfectly on my Windows 2000. Btw, I was using MSVC++ toolkit 2003 with SDK, just for the record. I don't have WINAPI installed on my mingw.
ps. The function declarations are not made up by me. If the original writer ever bothers coming here, feel free to get the credit.