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If my function has try and catch in it, do I put a return at the end of the catch block? I have a return at the end of my try block. My function returns an int.
Thanks,
ns
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You should put the return outside the try catch block, otherwise you need to return inside the catch and the try. The point of the catch is that the rest of the try code will not be executed. I'd do something like this
int MyFunc()
{
int nRetVal = -1;
try
{
}
catch (...)
{
}
return nRetval;
}
Where -1 is a sensibile value to indicate failure, or to have no effect.
Christian
We're just observing the seasonal migration from VB to VC. Most of these birds will be killed by predators or will die of hunger. Only the best will survive - Tomasz Sowinski 29-07-2002 ( on the number of newbie posters in the VC forum )
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Appreciate the response.
ns
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I've looked in my .h file quite carefully, but dont see anything suspicious:
Compile error is:
c:\trainer\db2\dbclass.cpp(4) : error C2143: syntax error : missing ';' before 'PCH creation point'
and it points to the first line in the file...
Thanks,
ns
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Probably something is wrong in your stdafx.h
Try to correct it and do a full rebuild
Concussus surgo.
When struck I rise.
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Thanks,
I had a missing ; just like it said. It was not in an obvious place, but I did track it down. Learned how importannt it is to put #include <stdafx.h> before a #import directive, the hard way!!!
Thanks for responding,
ns
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I am a beginner just jumping right in and was wondering if anyone new a way to call an external .exe from inside mc++ source? 
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spawn, CreateProcess, ShellExecute, WinExec, you have many options.
-c
To explain Donald Knuth's relevance to computing is like explaining Paul's relevance to the Catholic Church. He isn't God, he isn't the Son of God, but he was sent by God to explain God to the masses.
/. #3848917
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Surely I dont have to recreate the project from scratch? The sample code I am using isnt an MFC app, so I dont know wht all to add, or not add, since I am getting the compile error of #include windows.h , a no-no in MFC apps apparently...
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What kind of database class are you wanting to add?
ADO should be as simple as adding the following to your CPP file
#include "stdafx.h"
#import "C:\Program Files\Common Files\System\ADO\msado15.dll" rename_namespace("littleADO") rename("EOF", "EndOfFile")
Michael 
Time flies like an arrow. Fruit flies like a banana
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Its what I had been trying to do to include support for a simple access db. i had the order of the #include and #import reversed, so wasted several hours debugging the errors I got. I thought I was missing something and needed more files to include or something. Thanks so much for the response,
ns
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I only have these files in my added class in an MFC project:
#import "C:\\Program Files\\Common Files\\SYSTEM\\ADO\\msado15.dll" \
no_namespace \
rename( "EOF", "adoEOF" )
#include "stdafx.h"
#include <ole2.h>
I get the compile error (for my added class:
c:\program files\microsoft visual studio\vc98\mfc\include\afxv_w32.h(14) : fatal error C1189: #error : WINDOWS.H already included. MFC apps must not #include <windows.h>
What is missing or extra ?
Thanks,
ns
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Move import line after
#include "stdafx.h"
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Thanks so much! That worked!
ns
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Hi again,
I've been asked to write a simple ftp client, usually that would be easy enough with wininet but for this it needs to be able to perform server to server transfers. Its for a system we're trying to implement for backing up our work. I know of FXP but how would I go about doing this in an MFC program? Its a bit daunting to be honest but we really need to get it done soon. Or even better if anyone knows of a library out there that has the features of being able to make server to server transfers, life would be great
Thanks
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i intend to develop a software to manage my private files.
when this software is running, no "save" or "edit" commands will
be allowed in the MS office (word, excel...). Now i
am wondering whether there has already been some software
like this, or, if not, can anyone give me some hints?
(now i can use my program to capture the windows messages,
like WM_SIZE, WM_CLOSE in another program, but not
the "save" command.)
can i use API hooking to do this?
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I have:
char* tempImage = (char *) (_bstr_t) pRecordset->Fields->GetItem ("pImage")->Value;
The stuff stored in Value is a pointer to data gotten out of a bmp (so its binary right? )
So should I be doing char*?
Not sure.
Also how to get the size of the image stored in Value? Strlen would count upto the first embedded Null, of which there are plenty in the binary data. So, what function to read the size?
Thanks,
ns
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The safer way would be checking the Value.vt and verify the Variant type you are receiving. Prolly a SAFEARRAY of BYTE or a BSTR; in this case, I would not use char *, I would use LPCTSTR indeed.
Concussus surgo.
When struck I rise.
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The safer way would be checking the Value.vt and verify the Variant type you are receiving. Prolly a SAFEARRAY of BYTE or a BSTR; in this case, I would not use char *, I would use LPCTSTR indeed. The _bstr_t or SAFEARRAY manipulation classes and APIs have methods for safely determining the length.
Concussus surgo.
When struck I rise.
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Hi,
I would like detect when I execute an application (exe) if exist. Ok for that part I finding the code.
Now I would like if the EXE exist active the window.
Best Regards
youssef
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how to use valarray.
i get many errors from #include<valarray>
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hi,
i have lots of drawing to be done with all tha data in the doc.after initialising the starting point and various other params,i draw it throught the view in ondraw like
pDocument->Draw(pDC)
because the drawing takes all params present in the doc itself.
Now,i need to draw the diagram right when a new scrollview is created and i follow all the regular steps like setting the map mode etc just like the scribble example.
The problem is,the view created on startup has the diagram but the new one created from Ctrl+N fails and takes me to scrollview source's line that checks if the mapping mode in MM_NONE.
Why.If the first one drew all the others should!I am stuck;help
Carlos
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Is this a SDI or MDI application? If MDI (that's what I guess), your new doc is blank!
Do you need to share the same document between documents object? then why having separate docs objects. Do you know you may have many views attached to a single document? is it what you are trying to accomplish here?
You may call UpdateAllViews(...) to force redraw of your views, use lHint if you want to indicate which part (object) need to be invalidated.
As my daughter would say, "... Whatever!"
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hi ernsest
my sw deals with with system designing so there has to be many diagrams which are finally connected to a main one.For this i have ot have different documents and with that different views.
As i said,the view created on startup is fine but not the new ones.
(i have now come to the gui part of my sw and am testing.Actually,no views should be on startup but created only when required with a project;when Ctrl+N dosent work i guess the views created on demand too will not work)
carlos
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In a non MFC app theres a try-catch thing like:
catch ( _com_error &e )
{
_bstr_t bstrSource (e.Source());
_bstr_t bstrDescription (e.Description());
TRACE ( "Exception thrown for classes generated by #import" );
TRACE ( "\tCode = %08lx\n", e.Error ());
TRACE ( "\tCode meaning = %s\n", e.ErrorMessage ());
TRACE ( "\tSource = %s\n", (LPCTSTR) bstrSource);
TRACE ( "\tDescription = %s\n", (LPCTSTR) bstrDescription);
AfxMessageBox ((LPCTSTR) bstrDescription);
}
catch (...)
{
TRACE ( "*** Unhandled Exception ***" );
}
I am using this code in an MFC app, in a new class that I am making. When I compiled I got the error:
c:\program files\microsoft visual studio\vc98\mfc\include\afxv_w32.h(14) : fatal error C1189: #error : WINDOWS.H already included. MFC apps must not #include <windows.h>
When I looked this up in MSDN , I see
Fatal Error C1189
#error : user supplied error message
This error message is generated when there is an #error directive in the program. For example:
#undef _WIN32
#if !defined(_WIN32)
#error _WIN32 must be defined //error
#endif
int main() {
return 0;
}
I only have #include "stdafx.h" in my new projects class .h file.
What can I do about this error?
Thanks,
ns
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