C / C++ / MFC

Re: Saving console's output buffer

3-Mar-06 2:50

If what I'm thinking of is what you are after, I'm going way back in my brain to retrieve it. If this "splash screen" is part of the console window, as opposed to a GUI splash screen, you need to read 4,000 bytes from memory address 0xb8000000. That is the starting address of the video display. Something like:

char far *pDisplay = (char far *) 0xb8000000;
char sBuffer[4000];
 
// save contents of screen
char far *pTemp = pDisplay;
for (int x = 0; x < sizeof(sBuffer); x += 2)
{
    sBuffer[x]   = *pTemp++; // character
    sBuffer[x+1] = *pTemp++; // attribute
}
 
// write new stuff to screen
 
// restore screen
for (x = 0; x < sizeof(sBuffer); x += 2)
{
    *pTemp++ = sBuffer[x];   // character
    *pTemp++ = sBuffer[x+1]; // attribute
}

Am I way off track here?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Brett Peirce6-Mar-06 6:30

Brett Peirce

6-Mar-06 6:30

Sorry I took so long to respond. This looks like basically what I'm after, assuming I can figure it out (and the memory address is correct) - It'll take me a bit to figure it out. Thanks for your help; I hope I get it working - we'll see. I appreciate your time.

sincerely, Brett Peirce - PolerBear
To err is human; To forgive: divine.

passing CString into ofstream?

ldsdbomber2-Mar-06 6:09

ldsdbomber

2-Mar-06 6:09

can anyone tell me what I am doing wrong here?

CString SelectedFile (passed into function)

ofstream OutputFileStream;
OutputFileStream.open (fileBrowser.GetFileName(), ios::out);

OutputFileStream<<"FileName;"<

Re: passing CString into ofstream?

David Crow2-Mar-06 6:32

Re: passing CString into ofstream?

2-Mar-06 6:32

ldsdbomber wrote:
OutputFileStream<<"FileName;"<<selectedfile<<endl;< blockquote="">

Try:
OutputFileStream<<"FileName;"<<(LPCTSTR)SelectedFile<<endl;
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

ldsdbomber2-Mar-06 21:54

ldsdbomber

2-Mar-06 21:54

Thanks. I thought that might work, but it just looks wrong. I guess I just couldn't believe that you couldn't throw a CString into a stream without messing about

WMI Win32_PingStatus address help

viperlogic2-Mar-06 5:47

2-Mar-06 5:47

Hi
I have below the following piece of code in a vc++6 MFC dialog project. i want to have it that the ip address can be entered into a "edit box" and that ip address can then be pinged.

im guessing that i change the WHERE Address=\"127.0.0.1\"" to WHERE Address='"+Addy+"'" or is that wrong?

how do i declare the variable Addy, as i have tried a few but no sucess

please help

Existing code....
hres = pSvc->ExecQuery( L"WQL", L"SELECT * FROM Win32_PingStatus WHERE Address=\"127.0.0.1\"", WBEM_FLAG_FORWARD_ONLY, NULL, &pEnumerator);

-- modified at 12:01 Thursday 2nd March, 2006

David Crow2-Mar-06 8:02

2-Mar-06 8:02

Are you wanting something like:

CString strIPAddress = L"127.0.0.1";
CString strQuery;
strQuery.Format(L"SELECT * FROM Win32_PingStatus WHERE Address = %s", (LPCTSTR) strIPAddress);
hres = pSvr->ExecQuery(L"WQL", strQuery, ...);

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

viperlogic2-Mar-06 8:19

2-Mar-06 8:19

thx for the reply

but that turned up two errors...

1) error C2664: 'void __cdecl CString::Format(const char *,...)' : cannot convert parameter 1 from 'unsigned short [50]' to 'const char *'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast

2) error C2664: 'ExecQuery' : cannot convert parameter 2 from 'class CString' to 'unsigned short *const '

David Crow2-Mar-06 8:26

2-Mar-06 8:26

So try removing the Ls from the string literals. Are you using Unicode or not?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

viperlogic2-Mar-06 8:36

2-Mar-06 8:36

i honstly couldnt tell you as visual c++ is new to me, im still just getting to hand with these new variable types.

the error i get now is as follows....
error C2664: 'ExecQuery' : cannot convert parameter 1 from 'char [4]' to 'unsigned short *const '

my code is now....
CString strIPAddress = "127.0.0.1";

CString strQuery;

strQuery.Format("SELECT * FROM Win32_PingStatus WHERE Address = %s", (LPCTSTR) strIPAddress);

hres = pSvc->ExecQuery("WQL", strQuery, WBEM_FLAG_FORWARD_ONLY, NULL, &pEnumerator);

many thanks for your help

Ryan Binns2-Mar-06 16:59

Ryan Binns

2-Mar-06 16:59

Put the L back in front of the "WQL" string - ExecQuery() is expecting a Unicode string, which is what the 'L' specifies.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

viperlogic2-Mar-06 22:44

2-Mar-06 22:44

In trying that i still get an error

the error is....

error C2664: 'ExecQuery' : cannot convert parameter 2 from 'class CString' to 'unsigned short *const '

my code is......
CString strIPAddress = "127.0.0.1";
CString strQuery;
strQuery.Format("SELECT * FROM Win32_PingStatus WHERE Address = %s", (LPCTSTR) strIPAddress);
hres = pSvc->ExecQuery(L"WQL", strQuery, WBEM_FLAG_FORWARD_ONLY, NULL, &pEnumerator);

Nibu babu thomas3-Mar-06 0:27

Nibu babu thomas

3-Mar-06 0:27

keithlee wrote:
strQuery.Format("SELECT * FROM Win32_PingStatus WHERE Address = %s", (LPCTSTR) strIPAddress);
hres = pSvc->ExecQuery(L"WQL", strQuery, WBEM_FLAG_FORWARD_ONLY, NULL, &pEnumerator);

strQuery.Format(_T("SELECT * FROM Win32_PingStatus WHERE Address = %s"), (LPCTSTR) strIPAddress);
hres = pSvc->ExecQuery(_T("WQL"), strQuery, WBEM_FLAG_FORWARD_ONLY, NULL, &pEnumerator);

Does this help?

Nibu thomas
Software Developer

viperlogic3-Mar-06 4:36

3-Mar-06 4:36

that shows the followng error

error C2664: 'ExecQuery' : cannot convert parameter 1 from 'char [4]' to 'unsigned short *const '

Ryan Binns3-Mar-06 13:50

Ryan Binns

3-Mar-06 13:50

Have you done any Unicode programming? You need to convert your string to Unicode. Include the atlconv.h file and do this:

CString strIPAddress = _T("127.0.0.1");
CString strQuery;
strQuery.Format(_T("SELECT * FROM Win32_PingStatus WHERE Address = %s"), (LPCTSTR) strIPAddress);
hres = pSvc->ExecQuery(L"WQL", T2W(strQuery), WBEM_FLAG_FORWARD_ONLY, NULL, &pEnumerator);

This will ensure that all the strings are of the correct type and should work nicely.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

viperlogic6-Mar-06 9:08

6-Mar-06 9:08

hi
no luck there with the above code, any idea whats wrong?

i get the following errors....

error C2065: '_lpa' : undeclared identifier

error C2679: binary '=' : no operator defined which takes a right-hand operand of type 'class CString' (or there is no acceptable conversion)

error C2065: '_convert' : undeclared identifier

viperlogic6-Mar-06 9:27

reading a string from a file

6-Mar-06 9:27

just found the problem, did a look up on MSDN and you need to specify

USES_CONVERSION;

wohoo, finally it works!

SWDevil2-Mar-06 5:33

SWDevil

2-Mar-06 5:33

Hi,

I have an MFC application in which I have to read a string from a file.
For Example, somewhere in the file I have something like: <>12345<>, and I have to find the <> and then read the 12345 string.
(the file I am reading from is not an HTML file).
The string can be somewhere in the file - in the beginning, end or somewhere in the middle.

how can I do this?

-- modified at 11:43 Thursday 2nd March, 2006

David Crow2-Mar-06 6:34

2-Mar-06 6:34

SWDevil wrote:
how can I do this?

Read the file into a CString object, then use the Find() method.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

SWDevil2-Mar-06 8:14

SWDevil

2-Mar-06 8:14

How do I read the file into a CSring object?
And, after I find the location of the <>, how can I isolate the "12345" string?

Thanks Smile | :)

David Crow2-Mar-06 8:28

Just take what is between >> and <<.

2-Mar-06 8:28

SWDevil wrote:
How do I read the file into a CSring object?

It does not have to be a CString object, but since you are using MFC, that's why I suggested it. Use CFile::Read().

SWDevil wrote:
And, after I find the location of the <>, how can I isolate the "12345" string?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

SWDevil2-Mar-06 8:36

SWDevil

2-Mar-06 8:36

does CFile::Read()return a CString obbject (I don't have MSDN at the moment, that's why I'm asking)

DavidCrow wrote:
Just take what is between >> and <<.

How do I do that? with Right/Left functions?

Wes Aday2-Mar-06 9:09

Wes Aday

2-Mar-06 9:09

If you use a CStdioFile you can use the ReadString() function to read the line directly into a CString.

ReadString(input);

then you can do the find on your input

int endtag = input.Find(">>", 0);

Why is common sense not common?

Never argue with an idiot. They will drag you down to their level where they are an expert.