C / C++ / MFC

19-Jun-06 9:41

I am trying to write an MFC application (Visual C++, on Windows XP) that calls QueueUserAPC(). But the compiler just says:

error C2065: 'QueueUserAPC' : undeclared identifier

Can someone show me an example of an MFC application's include files that runs this function please ..........

I have tried including winbase.h, and setting/unsetting things like _WIN32_WINNT, but nothing seems to work.

Frown | :-(

cheers,
Neil

David Crow19-Jun-06 9:55

19-Jun-06 9:55

neilsolent wrote:
I have tried...setting/unsetting things like _WIN32_WINNT...

How?

This compiles fine:

#define _win32_WINNT 0x500
#include <windows.h>

void main( void )
{
    QueueUserAPC(0, 0, 0);
}

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

neilsolent19-Jun-06 10:32

19-Jun-06 10:32

Thanks. Yes your code does compile, but it is not an MFC application with the MFC headers. i.e. The following doesn't compile (project created with VC++ Wizard - console application that supports MFC - with your lines added)...

#include "stdafx.h"

#define _win32_WINNT 0x500
#include <windows.h>
void main( void )
{
QueueUserAPC(0, 0, 0);
}

The stadfx.h seems to screw it up....

Any ideas?

cheers,
Neil

David Crow19-Jun-06 10:38

19-Jun-06 10:38

There's no need to include windows.h when using MFC as the Afx header files do this automatically. All you need to do is define _WIN32_WINNT before any files get included by the preprocessor.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

neilsolent19-Jun-06 11:03

19-Jun-06 11:03

Yes, that's the kind of thing I've been trying ... but it still doesn't seem to work.

I have tracked the problem down to this include statement:

#include "winsvc.h"

If I comment this include out (it comes straight after #include "stdafx.h"), the compiler can resolve QueueUserAPC() (but obviously loads of other code doesn't work then!)

Thanks for all your help so far .....

cheers,
Neil

neilsolent19-Jun-06 11:05

Question about Com in Visual C++...

19-Jun-06 11:05

Sorry ignore that last message ... that was rubbish

What you said last time is correct. Silly me

Frown | :(

cheers,
Neil

Yanshof19-Jun-06 9:18

Yanshof

19-Jun-06 9:18

Hi All

I wonder about the reason that after create and use some com pointer ( Smart pointer ) why we must call delete of the current pointer ?
I know that the reason is to save memory - but if we does not delete the pointer the application will be crash.

So some one can tell me why the application will crash in case we did not delete the pointer ??

Thanks for any help. Rose | [Rose]

No one can help me with this question ... ?

Yanshof19-Jun-06 17:36

Yanshof

19-Jun-06 17:36

Thanks

Re: No one can help me with this question ... ?

Milton Karimbekallil19-Jun-06 21:27

Milton Karimbekallil

19-Jun-06 21:27

If you are talking about the COM Smart pointers, then you dont have to call a delete on it and we cant delete a com object as it is CoCreated rather new'ed.

its distructor will take care of releasing active interaces. Once all active interfaces are released the component class objuect will get released automatically, and once all the component class objects are unloaded, the component itself will get unloaded.

Only thing qe need to do is to call Release() on the COM interface. But if it is a Smart pointer you dont have to do that, smart pointer distructor will take care of this. Thats why its smart pointer.

cheers...milton kb.

Re: No one can help me with this question ... ?

Steve S19-Jun-06 21:30

Steve S

19-Jun-06 21:30

Milton KB wrote:
Only thing qe need to do is to call Release() on the COM interface. But if it is a Smart pointer you dont have to do that, smart pointer distructor will take care of this. Thats why its smart pointer.

That depends. If you call CoUninitialize() before the smart pointer goes out of scope and hence, has not yet called Release, then you will get a crash, as the call to Release goes off into "I've unloaded that DLL" land.

A trivial fix is to rescope:

CoInitialize(NULL);
{
CComPtr<ifooble> spFoobleThing;
....
}
CoUninitialize();

Steve S
Developer for hire

Re: No one can help me with this question ... ?

Milton Karimbekallil20-Jun-06 6:25

Milton Karimbekallil

20-Jun-06 6:25

thats correct. It is a common mistake COM developers make by putting CoIntialize and Couninitialize in the same function.

cheers...milton kb

Enumerating processes

Shawn Brant19-Jun-06 8:50

Shawn Brant

19-Jun-06 8:50

I came accross this great (http://www.codeproject.com/threads/processes.asp?df=100&forumid=4699&exp=0&select=278675) and was wondering if anyone could show how to also output the window title. Any help would be great thx!

Re: Enumerating processes

Justin Tay19-Jun-06 9:14

Justin Tay

19-Jun-06 9:14

Maybe you can try enumerating all the top level windows using EnumWindows(). And check if the process id matches (Use GetWindowThreadProcessId() ). With the window handle of the process, call GetWindowText() to get the title.

Re: Enumerating processes

David Crow19-Jun-06 9:16

19-Jun-06 9:16

See here.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Simple Reg Exp

spelltwister19-Jun-06 8:23

spelltwister

19-Jun-06 8:23

Hey everyone,

I've been looking around for a simple regular expressions thing to impliment into my code. However, the only kind I can find are far too advanced for what I need. I started writing it myself and got through any number of question marks with 1 asterisk. I cannot get any farther.

I only need it to beable to understand * and ?. So, something like comp_*_sales_*_?pav would hit something like comp_toyota_sales_inhouse_mpav.

It just needs to return true or false for the match. Any help or guidance would be amazing.

Thanks,

Mike

Gaming at the GuildofBlades.com is the only way to really experiece the level 99 Soul-Sucking Sword!

Re: Simple Reg Exp

Justin Tay19-Jun-06 8:42

Justin Tay

19-Jun-06 8:42

Have you tried this?

http://www.codeproject.com/string/wildcmp.asp[^]

Re: Simple Reg Exp

David Crow19-Jun-06 8:42

Determining the exact directory path [modified]

19-Jun-06 8:42

If you are looking to roll your own solution, when you encounter a * in the pattern, iterate through each successive character in the string-to-match until the character following the * is encountered. For example:

char *pszPattern = "comp_*_sales_*_?pav";
// if x points here ^
char *pszString = "comp_toyota_sales_inhouse_mpav";
// and y points here ^
// advance x one character to the _, and advance y until that character is encountered

When you encounter a ? in the pattern, iterate through one character in the string-to-match. As long as the next character matches the character following the ?, it matches.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: Simple Reg Exp

James R. Twine19-Jun-06 14:57

James R. Twine

19-Jun-06 14:57

Not sure why no-one else has mentioned it yet, but have you looked into the PathMatchSpec(...) function? It sounds like exactly the kind of functionality you are looking for, which is MS-DOS-style wildcard matching...

Peace!

-=- James

If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
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capricious_00119-Jun-06 6:09

capricious_001

19-Jun-06 6:09

Hi there,

I am trying to use CreateFile to open up a file handle however in some instances it doesnt work. Is there a way to convert a file location string into its exact case-sensitive string?

For example.

lszLogFile = "C:\\TeSt\\TeSt.txt";

HANDLE hLogFile = NULL;
hLogFile = CreateFile(lszLogFile, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);

lszLogFile is the actual parameter that works with create file and a handle is created, however if

lszLogFile = "C:\\test\\test.txt";

Then a handle will not be created. Is there a way to find out what the actual Directory string is?

Thanks guys,

Robbie

-- modified at 13:10 Monday 19th June, 2006

Added the extra backslashes, and no that wasnt the problem.

Steve S19-Jun-06 6:19

Steve S

19-Jun-06 6:19

Sure your problem is case related, not a lack of \ characters?

Steve S
Developer for hire

Maxwell Chen19-Jun-06 6:20

Maxwell Chen

19-Jun-06 6:20

capricious_001 wrote:
lszLogFile = "C:\\test\test.txt";

Should be:

lszLogFile = "C:\\test<font size=6>\\</font>test.txt";

Maxwell Chen

toxcct19-Jun-06 6:52

toxcct

19-Jun-06 6:52

where ? i can't see any difference ?! Unsure | :~

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Maxwell Chen19-Jun-06 6:54

Maxwell Chen

19-Jun-06 6:54

The gap is too large! Poke tongue | ;-P

Maxwell Chen