C / C++ / MFC Discussion Boards

Alan Balkany16-Feb-10 4:38

16-Feb-10 4:38

I think the best intro to MFC is Microsoft's Scribble Demo. It takes you through the construction of an MFC app that lets you draw "Hello World" on the screen with the mouse. http://msdn.microsoft.com/en-us/library/aa716527%28VS.60%29.aspx[^]

Dynamic creation of button

shiv@nand10-Feb-10 23:04

shiv@nand

10-Feb-10 23:04

hi i am creating 10 buttons dynamically in a MFC dialog. But i want to all 10 buttons in a Vertical arrangement or Auto Arrangement in a Dialog.
CButton *m_btnDynamic = new CButton();
m_btnDynamic->Create(,,,,);
how should i get in a proper order.otherwise all buttons in a same position

Re: Dynamic creation of button

Cedric Moonen10-Feb-10 23:19

Cedric Moonen

10-Feb-10 23:19

You should learn to check the documentation[^]. As mentioned, the third argument is the position of your button.

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Plz help to choose correct career path

nknadim10-Feb-10 22:57

nknadim

10-Feb-10 22:57

Hi,
I am working as a software Engineer(C/C++) since last 2.5 years. My work includes application development in C,C++ using some GIS(Geographic information systems) API. We are not using MFC or any other VC++ components. Now I am looking for a job change in C++ and UNIX/Windows but not able to get some good opportunity. I am finding it really hard to find a new job. I have good working knowledge of C, C++ and also worked in UNIX for 8 months. Is it difficult for me to change GIS Domain now? Please guide me to choose correct career path.

Thanks

Re: Plz help to choose correct career path

AbhinavR10-Feb-10 23:20

AbhinavR

10-Feb-10 23:20

Thanks Nk for posting this question i am also facing the same problem with my career.Inspite the market was getting better n better I wont find my career.
Any experienced professional out there help sort it out this problem.

Thanks:
Abhi

Re: Plz help to choose correct career path

David Crow11-Feb-10 2:49

David Crow

11-Feb-10 2:49

nknadim wrote:
I am finding it really hard to find a new job.

As is the rest of the country.

nknadim wrote:
I have good working knowledge of C, C++ and also worked in UNIX for 8 months.

What do you offer that others do not?

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Man who follows car will be exhausted." - Confucius

Re: Plz help to choose correct career path

nknadim11-Feb-10 3:16

nknadim

11-Feb-10 3:16

thanks for your reply.what i offer is only my skills and dedication for work but really nowadays employer's expectations are really high.they want jack of all trades.

Re: Plz help to choose correct career path

molesworth11-Feb-10 7:25

molesworth

11-Feb-10 7:25

Employers do have high expectations, and with the current situation with lots of applicants for every job, they can afford to be that way. To even be considered for an interview you have to stand out from the crowd, which means having a good CV (resume), a good portfolio where appropriate, and a litel bit of style in your job application letter or email. Have a look round the net for more detailed advice on these.

I've been involved in selection and interviewing a lot over the years, and what I (and most people) look for as much as technical competency, is a good personality, ability to learn, think on your feet, and someone who'll integrate well with the rest of the team - although technical skills are of course the most important consideration.

nknadim wrote:
...they want jack of all trades.

Not really, or at least not in the industries I've worked in. Many jobs require specific skills, and even if you're not an exact match, having related ability, or knowledge of a field can be an asset, as can clear demonstration of the ability to quickly learn and adapt.

My best advice is to just keep applying - there are plenty of jobs out there (but there are a lot of people after them). You just have to get someone's attention once, and you can be the one selected.

Days spent at sea are not deducted from one's alloted span - Phoenician proverb

Need best approach to use a class inside other class

Nandu_77b10-Feb-10 22:15

Nandu_77b

10-Feb-10 22:15

I have a base class say “ClassBase” and I have derived two classes “Classdrv1” & “Classdrv2” from base class as shown below. Now I am not sure how to use class “Classdrv2” in “Classdrv1”. For this implementation there should not be any code change in base class. What is the best approach for the same?

Class ClassBase
{

}

class Classdrv1 : public ClassBase
{
// need to use classdrv2 here, how?
}

class Classdrv2 : public ClassBase
{

}

Thanks,

Nandu

Re: Need best approach to use a class inside other class

CPallini10-Feb-10 22:26

CPallini

10-Feb-10 22:26

You may do, for instance:

class Base
{
//...
};
class Der2;
class Der1: public Base
{
Der2 * pd2;
//...
};
class Der2: public Base
{
//..
};

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Need best approach to use a class inside other class

Nandu_77b10-Feb-10 23:54

Nandu_77b

10-Feb-10 23:54

Thanks Pallini, This is one approach, other than this do we have another approach available.

Regards,
Nandu

Re: Need best approach to use a class inside other class

Avi Berger11-Feb-10 0:31

Avi Berger

11-Feb-10 0:31

Just how do you plan to use it?

You do realize that to use the class, unless you are talking about a static (class) function, you need an object of the class.

So how are you getting this object & how long are you keeping it for? How does it relate to the rest of the program? An object of Classdrv2 of its own for the entire lifetime of a Classdrv1 object? An object of Classdrv2 just for use during the execution of a member function of Classdrv1? An object of Classdrv2 provided by a caller for manipulation by a member function of Classdrv1?

There are lots of possibilities. Which is right for your situation depends on what you are trying to achieve. If you explained more, you might get more focused answers.

Please do not read this signature.

Control Button Resize

shiv@nand10-Feb-10 21:59

shiv@nand

10-Feb-10 21:59

i have a button control(IDC_BUTTON1) the default size is 50*50,if i click on that , button has to resize the 50*150 with the same position.please help me

Re: Control Button Resize

«_Superman_»10-Feb-10 22:08

«_Superman_»

10-Feb-10 22:08

Use MoveWindow supplying the handle of the button and specify the new dimensions.
You can also use SetWindowPos.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Re: Control Button Resize

CPallini10-Feb-10 22:13

CPallini

10-Feb-10 22:13

If you are using MFC then you may call the SetWindowPos method, specifying (SWP_NOZORDER | SWP_NOMOVE) for the nFlags argument.
Smile | :)

CWnd and AcroPDF inproc issue

kasi1410-Feb-10 9:13

kasi14

10-Feb-10 9:13

Hi All,

I am using AcroPDF.PDF control to host pdf document in my MFC application.

m_wnd.CreateControl( _T("AcroPDF.PDF.1"), NULL, WS_CHILD | WS_VISIBLE, rect, this, 0);

When the client machine had AdobeReader 9.0. The Adobe(AcroReader) memory is attached to my application memory.
When the client machine had AdobeReader 8.0. The Adobe(AcroReader) is a seperate process.

How can i make sure that in either cases i make acro reader out of proc.

When i had the adobe inproc to my application i am getting memory related issues. So i want to kee the adobe out of proc.

Any inputs on how we can make it outproc is appreciated.

Thanks,

Re: CWnd and AcroPDF inproc issue

Nish Nishant10-Feb-10 10:59

Nish Nishant

10-Feb-10 10:59

This article[^] should help you do this.

Regards,
Nish

Nish’s thoughts on MFC, C++/CLI and .NET (my blog)
My latest book : C++/CLI in Action / Amazon.com link

Re: CWnd and AcroPDF inproc issue

kasi1410-Feb-10 11:46

kasi14

10-Feb-10 11:46

Hi,

Thanks for the info.

I am in the situation where the dll is on several client machines. My application when using the dll should be sure it will load as outproc.

Kasi

Error checking

gregarion10-Feb-10 6:51

gregarion

10-Feb-10 6:51

Hey guys i am facing a problem in my sql statement. I am trying to check if there is such a value in the database.

Code:

  
      string NewMovie = "ww";
  
      string queryText ;
  
   

  queryText = "Select * from movie_info WHERE movie_title = '"+ NewTitle +"'";
      MYSQL *conn;

      conn=mysql_init(NULL);
 
     mysql_real_connect(conn,host,username,password,database,0,NULL,0);
  

  mysql_query(conn,queryText.c_str());
  
       ????
 
      mysql_close(conn);
  
       

      return 0;

The problem i am facing is how do i check if the value is found. I read up and found that a query will return a value of TRUE if the query is a success and a FAIL if there is an error. How do i call these values and then based the check on it?

Re: Error checking

CPallini10-Feb-10 7:04

CPallini

10-Feb-10 7:04

I guess you'll get 0 (i.e. success) either if the record is found and if it is NOT found, because, technically, the query succeeded.
Why don't you query instead for the record count (using the COUNT SQL function)?
Smile | :)

Re: Error checking

gregarion10-Feb-10 7:27

gregarion

10-Feb-10 7:27

Yeap i tried smting like this...

    string NewTitle = "ww";
          string queryText ;
 queryText ="Select COUNT(*) from movie_info WHERE movie_title = '"+ NewTitle +"'";


if (mysql_query(conn,queryText.c_str()) )

{



}

but im not too sure how to get the values out? like if it reads 1 table? how can i call it out?

Re: Error checking

CPallini10-Feb-10 7:42

CPallini

10-Feb-10 7:42

The query is OK. Now you've to fetch the data (actually the single value).
An example here [^] (check out the "Retrieving data from the database" section).
Smile | :)

COleDispatchDriver

trioum10-Feb-10 6:32

trioum

10-Feb-10 6:32

how to read and write excel file using COleDispatchDriver

Trioum

Re: COleDispatchDriver

Bram van Kampen10-Feb-10 15:51

Bram van Kampen

10-Feb-10 15:51

Well,

You start with buying a few Books about the Subject, Reading them, and, then when you know what you're talking about, you start Googeling.

Smile | :)

Bram van Kampen

Re: COleDispatchDriver

trioum12-Feb-10 18:50

trioum

12-Feb-10 18:50

I still cannaot find any thing can you send me the link

Trioum

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