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no, there is no \\ the sequence. the first \ escapes the second ' , changing it from a special C/C++ metacharacter to a literal string character. so, your statement ends up meaning roughly the same as this:
Replace('x, ',');
and that can't be parsed
bottom line: if you want a \ in a string, you have to use \\.
-c
Conservative:
One who admires radicals centuries after they're dead.
-- Leo C. Rosten
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I'm TRYING to catch database exception and output that to an error file. Here's the CATCH code :
catch (CdbException)
{
FILE* errorfile;
errorfile=fopen("c:\\cristi\\error.err","a");
fprintf(errorfile,"v,dmlkvmdsv");
for (long ct = 0; ct < dben.Errors.GetCount(); ct++)
{
fprintf(errorfile,_T("\t Error #%ld: #%ld -- %s\n"),
ct,
DBERR(dben.Errors[ct].GetNumber()),
dben.Errors[ct].GetDescription());
}
fclose(errorfile);
return;
}
This code just won't work. I get nothing in the file. Nothing. It's not even accessed.
This other code below that prints the error data to the screen works.
catch (CdbException)
{
for (long ct = 0; ct < dben.Errors.GetCount(); ct++)
{
printf(_T("\t Error #%ld: #%ld -- %s\n"),
ct,
DBERR(dben.Errors[ct].GetNumber()),
dben.Errors[ct].GetDescription());
}
return;
}
Now. ---> In both cases I get this error message:
Debug Assertion Failed!
Program: ...program
File:dbgheap.c
Line:1044
Expression: _CrtIsValidHeapPointer(pUserData)
I belive the second code works because of the printf lack of buffering so that the error message that I display at the console displays faster than the debug assertion failed error. Anyway, this isn't the problem. The problem is why do I get that error message. What happend over there. Anyone encountered this problem before ?
Thank you!
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Are you sure dben.Errors[ct].GetDescription() is returning a char* and not some other kind of string like CString or wchar_t*? That's the only thing I can see by just looking at your code.
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I have been trying to execute a console application (32 bit), and get it's output from a Win32 (MFC) application. I have tried the CSpawn article on www.codeproject.com, but it does not work fur Windows98, and does not wait until the program exits they way I need it to.
I have also tried the MSDN articles. They mention that 16-bit console apps need an extra CreateProcess, but I don't think I need that since the console app is a 32-bit app? I do not ever create console apps, so am I wrong about this? Are all console apps considered 16-bit?
I'd rather not re-invent something if someone has already solved this one.
Any ideas on where to look?
Thanks,
Dave
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Check KB article Q190351 "HOWTO: Spawn Console Processes with Redirected Standard Handles".
Tomasz Sowinski -- http://www.shooltz.com
Never argue with an idiot, he'll bring you to his level and beat you with experience.
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Thanks, I have tried this, and had problems. Have you ever tried to implement code from this article?
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No. What is the problem?
Tomasz Sowinski -- http://www.shooltz.com
Never argue with an idiot, he'll bring you to his level and beat you with experience.
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Thanks anyway, there are several problems, but it's not worth getting into. I was hoping to find someone that had actually implemented something similar to what I am attempting.
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It just doesnt work  Thats why I wrote the CSpawn class.
int x=1, y=5;
x^=y^=x^=y;
<a href="http://www.codeproject.com/useritems/StupidXORTrick.asp" target="_blank">ClickHereForHelp();</a>
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Whats wrong with CSpawn? What does it do under Win98? As far as I know it should work. Maybe I can give you a hint on how to adapt it (well, I wrote it).
int x=1, y=5;
x^=y^=x^=y;
<a href="http://www.codeproject.com/useritems/StupidXORTrick.asp" target="_blank">ClickHereForHelp();</a>
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Thanks,
I think it probably does very well when using it the way you intended.
I am using it as a "read only", and wait until completed type of operation.
I was able to get it going under w98 by ignoring the following failure:
(In Execute(...))
if (!SetStdHandle(STD_OUTPUT_HANDLE, m_hSaveStdout)){
}
For some reason, this fails under W98, but not NT. It does not seem to affect anything, so I am ignoring the failure for now.
Any idea what is happening?
Thanks,
Dave
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You can modify the behavior as you need it when you look at the comment to CSpawn.
About the failure under W98 I have no clue as I have no W98 system available (its almost obsolete anyway). Maybe someone with W98 experience might tell.
int x=1, y=5;
x^=y^=x^=y;
<a href="http://www.codeproject.com/useritems/StupidXORTrick.asp" target="_blank">ClickHereForHelp();</a>
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Thanks for the reply. I was able to make some modifications to make it work the way I needed it. I'm going to try to see why the one failure happens in W98. What you have written is great stuff. I'm sure I would have had no problems if I were using it the way you intended.
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#include <windows.h>
#include <malloc.h>
#include <string>
namespace std {
#ifdef _UNICODE
typedef wstring tstring;
#else
typedef string tstring;
#endif
};
std::tstring RunProcessAndCaptureOutput(LPCTSTR CmdLine, DWORD maxWaitTime = INFINITE)
{
LPTSTR copyOfCmdLine = LPTSTR(alloca(sizeof(TCHAR) * (lstrlen(CmdLine) + 1)));
lstrcpy(copyOfCmdLine, CmdLine);
std::tstring s;
SECURITY_ATTRIBUTES SecAttr;
SecAttr.nLength = sizeof(SecAttr);
SecAttr.lpSecurityDescriptor = NULL;
SecAttr.bInheritHandle = TRUE;
HANDLE hRead, hWrite;
if (::CreatePipe(&hRead, &hWrite, &SecAttr, 0)) {
STARTUPINFO StartupInfo;
ZeroMemory(&StartupInfo, sizeof(StartupInfo));
StartupInfo.cb = sizeof(StartupInfo);
StartupInfo.dwFlags = STARTF_FORCEOFFFEEDBACK|STARTF_USESTDHANDLES;
StartupInfo.hStdError = hWrite;
StartupInfo.hStdOutput = hWrite;
PROCESS_INFORMATION ProcessInfo;
if (::CreateProcess(NULL, copyOfCmdLine, NULL, NULL, TRUE, DETACHED_PROCESS, NULL, NULL, &StartupInfo, &ProcessInfo)) {
std::tstring capturedOutput;
const DWORD smallWaitTime = 100;
__int64 ftEnd;
GetSystemTimeAsFileTime(LPFILETIME(&ftEnd));
ftEnd += __int64(maxWaitTime) * __int64(10000);
CloseHandle(hWrite);
while (::WaitForSingleObject(ProcessInfo.hProcess, smallWaitTime) != WAIT_OBJECT_0) {
EmptyPipeAndAppendToString(hRead, capturedOutput);
__int64 ftNow;
GetSystemTimeAsFileTime(LPFILETIME(&ftNow));
if (ftNow > ftEnd) {
s += "Command \"";
s += CmdLine;
s += "\" timed out.";
s += " Partial output received\r\n\r\n";
break;
}
}
EmptyPipeAndAppendToString(hRead, capturedOutput);
CloseHandle(ProcessInfo.hProcess);
CloseHandle(ProcessInfo.hThread);
s += capturedOutput;
s += "\r\n\r\n";
}
else {
CloseHandle(hWrite);
s += "Error creating process with command \"";
s += CmdLine;
s += "\"\r\n\r\n";
}
CloseHandle(hRead);
}
else {
s += "Error creating pipe\r\n\r\n";
}
return s;
}
Stuart Dootson
'Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p'
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Thank you very much, I'll give it a try.
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Assume I have a CFont object in my CWnd derived class. And assume I wanna repeatedly change the font of my CWnd derived class. Say I do this :-
CFont *pf = GetFont();
LOGFONT lf;
pf->GetLogFont(&lf);
m_font.Detach();
m_font.DeleteObject();
m_font.CreateFontIndirect(&lf);
SetFont(&m_font);
Am I doing it right? Or is there a leak?
Nish
Author of the romantic comedy
Summer Love and Some more Cricket [New Win]
Review by Shog9
Click here for review[NW]
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Get rid of the Detach() call, or DeleteObject() won't actually do anything. Otherwise it looks good to me.
---
Shog9
If I could sleep forever, I could forget about everything...
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There is a leak,
m_Font.Detach() clears the HFONT handle from the m_Font wrapper class object so your not deleting anything when calling m_Font.DeleteObject().
Just remove the m_Font.Detach() line.
Roger Allen
Sonork 100.10016
I think I need a new quote, I am on the prowl, so look out for a soft cute furry looking animal, which is really a Hippo in disguise. Its probably me.
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I have read my image field from my database and put it in a variant as byte.Now I don't know how to show these bytes in my dialog.
Mazy
"If I go crazy then will you still
Call me Superman
If I’m alive and well, will you be
There holding my hand
I’ll keep you by my side with
My superhuman might
Kryptonite"Kryptonite-3 Doors Down
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1) Create device-independent bitmap (DIB) filling all required parameters - see CreateDIBSection
2) Fill DIB bits from your data - see SetBitmapBits
3) Create memory DC and select DIB in it - see CreateCompatibleDC, SelectObject
3) BitBlt or StretchBlt from memory DC to window DC
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Thanks.I have to go through them now. 
Mazy
"If I go crazy then will you still
Call me Superman
If I’m alive and well, will you be
There holding my hand
I’ll keep you by my side with
My superhuman might
Kryptonite"Kryptonite-3 Doors Down
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I have a CEditView and no matter what I try and can't get it so that there is a horizontal scroll bar. I've tried adding the ES_AUTOHSCROLL and the WS_HSCROLL but that doesn't seem to be doing it. Any help? Thanks.
[EDIT]: I just noticed that when I have the WS_HSCROLL and ES_AUTOHSCROLL styles on, when the window is resized the horizontal scroll bar appears but you can't horizontally scroll beacuse it is "wordwraped."
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code snippet:
AfxSocketInit();
CSocket socket;
socket.Create();
if(!socket.Connect(url,80))
{
int err=socket.GetLastError();
cout << err << endl;
}
Url is someting like: "http://www.somewhere.com/somepage.html".
The CSocket::Connect() always failes. It's strange but the errorcode returned by getlasterror is zero (0), so I can't retrieve any information about the error.
Init and create succeed though.
Somebody got a clue? What am I doing wrong here?
[VISUAL STUDIO 6.0] [MFC] [WIN98/2]
 Bluute tette!
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