C / C++ / MFC Discussion Boards

Le centriste20-Nov-02 10:52

20-Nov-02 10:52

tx Chris

Michel

It is a lovely language, but it takes a very long time to say anything in it, because we do not say anything in it, unless it is worth taking a very long time to say, and to listen to.

- TreeBeard

shellexecuteex, file associatationn editor

pnpfriend20-Nov-02 10:15

pnpfriend

20-Nov-02 10:15

Hi I'm using ShellExecuteEx to print the files..
for some files, I got error message saying "file association not found".

So I went to the directory where the file got saved and I set the associate editor by doing so,

click once on file name, right click, open with, choose the application or exe file ( notpad, wordpad,excel...etc.).

lets say, text document, so I open with notepad... it fine for once but not for next text file. I have to repeat the setting editor again...

Is there anyway that I can set the file editor programmatically???
can ShellExecuteEx do so??

Re: shellexecuteex, file associatationn editor

zenboy20-Nov-02 11:34

zenboy

20-Nov-02 11:34

When you right-click the file and select "open with, choose program", you can select the program to open the file with. On this same dialog box, there should be a checkbox to set, asking "Always use the selected program to open this type of file". Make sure this is checked and you shouldn't have any more problems.

ShellExecuteEx will not allow you to set associations. I'm assuming that you could change registry keys, but I'm not sure what, where, or how.

Windows 9X debugging problem

Hiusing20-Nov-02 10:07

Hiusing

20-Nov-02 10:07

Hello,

I have a program works fine in Windows XP/2K but having a lot of problem with Windows 98/ME after I've created couple hundred bitmap and inserted to a image list. I do not think it's because not enough memory since I create and destroy them one by one. I sure walk thought the program and I've released all image handle properly.

I also notice that some font has changed to the fixed font and cannot create window after the problem occur. I believe there's some kind of memory leak which only occur in Windows 9x. I used Purify but can't find any leak.

Do you have any clue what's going on? I'm guessing that I forget to release some handle in my program so Window 9x can't let me create font and window? Is there any program runs in Windows 9X shows me how many bmp, font etc handle holding in a program?

Thanks,
Hiusing

Re: Windows 9X debugging problem

James R. Twine20-Nov-02 10:46

James R. Twine

20-Nov-02 10:46

   Sounds like a GDI resource leak to me!  Some usual indications are: fonts start changing, things do not repaint correctly, and window creation fails.

    Posting the code snippets of how you create and destroy the bitmaps may help us help you determine if they actually are being destroyed and freed correctly.

   BTW: the resource leak could be with some other GDI code as well...

    Peace!

-=- James (Sonork:100.21837)
"There is nothing worse than being oblivious to the fact that you do not know what you are doing."
[Get Check Favorites 1.5 Now!]

Re: Windows 9X debugging problem

Christian Graus20-Nov-02 11:39

Christian Graus

20-Nov-02 11:39

Hiusing wrote:
I do not think it's because not enough memory since I create and destroy them one by one. I sure walk thought the program and I've released all image handle properly.

I am afraid that is not the case. W2000 catches these things and cleans them for you, this is a classic case of bitmaps or other GDI resources not being cleaned up properly.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Re: Windows 9X debugging problem

Roger Stewart20-Nov-02 14:53

Roger Stewart

20-Nov-02 14:53

There is an article in the March 2001 MSDN Magazine called Resource Leaks: Detecting, Locating, and Repairing Your Leaky GDI Code[^]. Download the Leaks.exe self-extracting zip. It contains a couple of tools for detecting leaks, one of which is called GDIUsage.exe. It is very useful for tracking down GDI problems.

Side Note: The author also has written a follow-up article in the December 2002 issue which addresses how to detect GDI leaks on NT, 2K, and XP called Detect and Plug GDI Leaks in Your Code with Two Powerful Tools for Windows XP[^]

Roger Stewart
"I Owe, I Owe, it's off to work I go..."

Adding Text In MDI RichEdit

Cerb20-Nov-02 9:50

Cerb

20-Nov-02 9:50

Which function can allow me to add text in RichEdit MDI acpplications like the ReplaceSel function does?

Re: Adding Text In MDI RichEdit

dima_t20-Nov-02 22:06

dima_t

20-Nov-02 22:06

I've looked through MSDN and think it's only way do do this.
Set the selection where you want to insert text (SetSel) and call ReplaceSel to insert text.

Re: Adding Text In MDI RichEdit

James R. Twine21-Nov-02 4:30

James R. Twine

21-Nov-02 4:30

   If you are asking specifically about Rich Text you need to use the EM_STREAMIN message with the SFF_SELECTION flag to be able to add Rich Text to the control (you can also use it to add plain text, too).

   Otherwise, why are you trying to duplicate the functionality of ReplaceSel(...)?

   Peace!

-=- James (Sonork:100.21837)
"There is nothing worse than being oblivious to the fact that you do not know what you are doing."
[Get Check Favorites 1.5 Now!]

Visual C++ compiler bug ???

Jim Crafton20-Nov-02 9:43

Jim Crafton

20-Nov-02 9:43

I have some code like so

void FooFunc( )
{
   class Bar {
      std::string name;
      std::info;
   };

   std::vector<Bar> barVec;
  
}

Looks good to me, right ?

Not according to Visual C++ (VC6 sp5)!

I get this:
error C2926: 'class FooFunc::Bar' : types with no linkage cannot be used as template arguments

Grrr! Is this correct? Or is this just some missing functionality in the compiler ? If so, is it fixed in VC7?
Certainly not a critical thing just annoying Frown | :(

¡El diablo está en mis pantalones! ¡Mire, mire!

Re: Visual C++ compiler bug ???

Christian Graus20-Nov-02 9:45

Christian Graus

20-Nov-02 9:45

I did not think you could define a class within a function ?

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Re: Visual C++ compiler bug ???

Jim Crafton20-Nov-02 10:01

Jim Crafton

20-Nov-02 10:01

Yes you certainly can. I have done this before, just never used it in a template till today.

¡El diablo está en mis pantalones! ¡Mire, mire!

Re: Visual C++ compiler bug ???

Maximilien20-Nov-02 9:50

Maximilien

20-Nov-02 9:50

I think there's some < and > missing !

Max.

Re: Visual C++ compiler bug ???

Jim Crafton20-Nov-02 10:02

Jim Crafton

20-Nov-02 10:02

reply, yeah I forgot to use the gt and lt symbols in the post, I fixed it - thanks for pointing that out

¡El diablo está en mis pantalones! ¡Mire, mire!

Re: Visual C++ compiler bug ???

ian mariano20-Nov-02 9:52

ian mariano

20-Nov-02 9:52

You need to "fill" the type for the vector template, that's all:

std::vector<Bar>   barVec;

"The greatest danger to humanity is humanity without an open mind."
- Ian Mariano - http://www.ian-space.com/

Re: Visual C++ compiler bug ???

Jim Crafton20-Nov-02 10:04

Jim Crafton

20-Nov-02 10:04

I did - I just forgot to use the gt and lt symbols in the html post - what you have in your reply i have in my code and it still bombs out. Weird

¡El diablo está en mis pantalones! ¡Mire, mire!

Re: Visual C++ compiler bug ???

Dave Bryant20-Nov-02 10:06

Dave Bryant

20-Nov-02 10:06

You're missing a semicolon after the class definition.

Dave

Re: Visual C++ compiler bug ???

Jim Crafton20-Nov-02 10:14

Jim Crafton

20-Nov-02 10:14

oops, I am a sloppy poster - I fixed hte original post - in the code I had the closing semi-colon and still it gave me the error

¡El diablo está en mis pantalones! ¡Mire, mire!

Re: Visual C++ compiler bug ???

Tim Smith20-Nov-02 10:30

Tim Smith

20-Nov-02 10:30

This isn't supported in V6 and I even think V7.

Solutions?

Move the class outside of the function.

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

Re: Visual C++ compiler bug ???

James R. Twine20-Nov-02 10:42

James R. Twine

20-Nov-02 10:42

   Looking up the error code explains the problem.

   But here is something to think about: Is the reason you are getting the error code because the "template code generator/expander" will only generate code once for a given template and template-argument(s)?

   Meaning, given the following code:

<br />
    class CClassA<br />
    { <br />
        std::vector< long > m_vecLongs;<br />
    };<br />
    //<br />
    // ...<br />
    //<br />
    class CClassB<br />
    { <br />
        std::vector< long > m_vecMoreLongs;<br />
    };<br />

   -Does the "code generator" evaluatate and generate code twice, once for each std::vector< long > or does it generate the code one time, and reuse it when it sees that it has already generated the code for that specific template/template-argument before?

   If the latter, it explains why the error occurs: there would be no way for the "code generator" to know if a local type called Bar is the same as another local type called Bar someplace else.  With external linkage, it has the mangled name (which uses classes/structs) to identify one over the other.  I do not believe that local identifiers get mangled.

   Just a thought...

    Peace!

-=- James (Sonork:100.21837)
"There is nothing worse than being oblivious to the fact that you do not know what you are doing."
[Get Check Favorites 1.5 Now!]

Re: Visual C++ compiler bug ???

Joaquín M López Muñoz20-Nov-02 10:45

Joaquín M López Muñoz

20-Nov-02 10:45

This is explictly banned in the standard: local classes cannot be used as template arguments (so this time it is not VC++ the one to blame).

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Visual C++ compiler bug ???

Jim Crafton20-Nov-02 10:51

Jim Crafton

20-Nov-02 10:51

Ahh, OK thanks - good to know.
But now I can't make fun of VC6 for this anymore. Damn... Smile | :)

¡El diablo está en mis pantalones! ¡Mire, mire!

Re: Visual C++ compiler bug ???

KevinHall21-Nov-02 11:23

KevinHall

21-Nov-02 11:23

All members of Bar are private. Could this be the problem?

Print Preview

act_x20-Nov-02 9:11

act_x

20-Nov-02 9:11

I am trying to print contents (as part of Print Preview ) of a TreeCtrl in my MDI application which has a CTreeCtrl member in the CFormView . I might need to print many pages(printer context). After I exceed 1 page height while printing, how do I force printing on the next page ? Also when I scroll pages all contents are lost ? why ?
What should I be doing to prevent this ?
I am basically implementing writing to the device context in my CView's OnPrint method !

Please help

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.