Re: Return value of a MFC Dialog Box Applicatin.. - C / C++ / MFC Discussion Boards

Return value of a MFC Dialog Box Applicatin..

Member 383463011-Aug-09 1:02

11-Aug-09 1:02

Hello,

I want to have a custom return value of a dialog box application.

We can change the return value by overriding ExitInstance().

Is it possible to have a string as return value? If yes how to achieve this?

Thank you..

Re: Return value of a MFC Dialog Box Applicatin..

Cedric Moonen11-Aug-09 1:10

Cedric Moonen

11-Aug-09 1:10

The DoModal function returns an integer so you won't be able to change that (except if you create your own function to create the modla dialog). But anyway, this is in general not needed: you could simply add a function that returns you the string. The return of DoModal is used to return informatino about how the dialog has been closed to the user. It doesn't make a lot of sense to return some kind of data there.

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: Return value of a MFC Dialog Box Applicatin..

CPallini11-Aug-09 1:49

CPallini

11-Aug-09 1:49

Do you really want to return a string value to the OS?
Smile | :)

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: Return value of a MFC Dialog Box Applicatin..

Maximilien11-Aug-09 2:39

Maximilien

11-Aug-09 2:39

maybe it's called from another process ?

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Re: Return value of a MFC Dialog Box Applicatin..

CPallini11-Aug-09 2:54

CPallini

11-Aug-09 2:54

Do you really want to return a string value to another process? Poke tongue | ;-P

Re: Return value of a MFC Dialog Box Applicatin..

Maximilien11-Aug-09 2:59

Maximilien

11-Aug-09 2:59

nope; but maybe the OP wants to.

This signature was proudly tested on animals.

Re: Return value of a MFC Dialog Box Applicatin..

CPallini11-Aug-09 3:10

CPallini

11-Aug-09 3:10

Well, he should know then there are a lot of IPC mechanisms.
Smile | :)

Re: Return value of a MFC Dialog Box Applicatin..

Member 383463011-Aug-09 4:04

Member 3834630

11-Aug-09 4:04

Requirement is to return a String? So have to find a soultion for it Frown | :(

..
It is used by other process and that is already defined to take String as input..

Re: Return value of a MFC Dialog Box Applicatin..

CPallini11-Aug-09 4:49

CPallini

11-Aug-09 4:49

You may, for instance, return a integer value and then call the other process with a string appropriate to such a integer return value, e.g. (pseudocode):

int r = call(myProcess);
switch( r )
{
case eOK:
  call(theOtherNastyProcess, "OK");
  break;
...
}

Re: Return value of a MFC Dialog Box Applicatin..

wmallory11-Aug-09 5:50

wmallory

11-Aug-09 5:50

Did you get your question fully answered by Cedric's response? I couldn't tell from your reply. If not, here's a little code snippet to demonstrate what (I believe) he was suggesting:

CMySpecialDialog MyDialog;

const int Status = MyDialog.DoModal();

if (Status == IDOK)
{
   const CString MyString = MyDialog.GetMyString(); 
}

This will work if you define a GetMyString method in your CMySpecialDialog class. Just remember to keep the string value in a member variable of the CMySpecialDialog class so that it still exists after the return from DoModal.

HTH

Re: Return value of a MFC Dialog Box Applicatin..

Member 383463011-Aug-09 23:11

Member 3834630

11-Aug-09 23:11

Thank you.. I will try on these lines..

Hide the appliation on startup without flickering

Deepak.Prahlad11-Aug-09 0:56

Deepak.Prahlad

11-Aug-09 0:56

I have an application which minimises to tray on start-up. I achieved this by a call to <pre>OnSysCommand(SC_MINIMIZE, 0);</pre> by posting a message in <pre>OnInitDialog()</pre>. But the dialog appears for a fraction of a second. In order to avoid the flicker I used the below code from CP. But it does not work as expected.

I found that when the "m_bFirstShowWindow = false" is commented out the window is not showing up and works as expected. But in that case I could not restore the window from the Tray. What is wrong in my logic?

I am using VS2005

<pre>
void CTestDlg::OnWindowPosChanging ( WINDOWPOS* lpwndpos )
{
            CDialog::OnWindowPosChanging(lpwndpos);
            if ( lpwndpos->flags & SWP_SHOWWINDOW )
     {
          if ( m_bFirstShowWindow )
          {
               m_bFirstShowWindow = false;
               lpwndpos->flags &= ~SWP_SHOWWINDOW;
          }
     }
}</pre>

Re: Hide the appliation on startup without flickering

Chandrasekharan P11-Aug-09 1:09

Chandrasekharan P

11-Aug-09 1:09

uncheck the visible property in the dialog properties Smile | :)

Re: Hide the appliation on startup without flickering

Deepak.Prahlad11-Aug-09 1:22

Deepak.Prahlad

11-Aug-09 1:22

it works !!

But can you just explain what is being done in the code Confused | :confused:

. Just for the academic interests ... I am new to VC.

Re: Hide the appliation on startup without flickering

Chandrasekharan P11-Aug-09 2:25

Chandrasekharan P

11-Aug-09 2:25

The value for the Visible gets changed in .rc file. Check the dialog properties in the .rc file.

Re: Hide the appliation on startup without flickering

Milind Mehendale18-Sep-09 2:29

Milind Mehendale

18-Sep-09 2:29

Its giving undeclared identifier for m_bFirstShowWindow
What am I missing???

Resize MainFrame to fit Child Frame

vikrant kpr11-Aug-09 0:49

vikrant kpr

11-Aug-09 0:49

Hey Friends

In a MDI application with CFormView derived view, i have a small Resource Template, so i need to resize main application to fit the size of the Child Frame.

Any idea how to do that ? or i have to resize the CMainFrame by calculating toolbar height / width + status bar height / width etc?

Regards

Audio Visualization

nabeel_anchal11-Aug-09 0:25

nabeel_anchal

11-Aug-09 0:25

I have created one MFC application which uses Windows media player SDK for playing audio files.How can we set default visualization even if there is no visualization set for the media player.Please help me.

Using a 3rd Party Library

jBusy11-Aug-09 0:25

jBusy

11-Aug-09 0:25

Hi
Though I have been programming on other platforms for a while, I am a newcomer to Windows development.

I have been given a 3rd Party library, and I am unsure of how ti use it with Visual Studio.

I have a created a project and pointed it towards the provided headers and library, and if I include the main .h file, the project compiles. So far so good. But what do I do with the provided .rc file?

If I import it and do a:
enum { IDD = IDD_MY_DIALOG };

I get an error. I can fix this by copying and pasting the dialog from the 3rd party .rc into my projects rc file - is that the right thing to do? That doesn't seem right...

Also I am not sure how to use the classes in the library, as trying to use them gives me a error that the class is abstract.

Thanks.

Re: Using a 3rd Party Library

Cedric Moonen11-Aug-09 0:52

Cedric Moonen

11-Aug-09 0:52

What is this third party library supposed to do ? Because it seems really strange that you have to include a .rc file D'Oh! | :doh:

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: Using a 3rd Party Library

jBusy11-Aug-09 1:35

jBusy

11-Aug-09 1:35

It's an audio capture tool. It has a number of dialogs to make changes to settings.

I've found that they included a mylibresource.h file, including that has got things working. But I am still confused why I am getting abstract errors when the classes in the library are not defined as abstract.

Re: Using a 3rd Party Library

Bacon Ultimate Cheeseburger11-Aug-09 14:10

Bacon Ultimate Cheeseburger

11-Aug-09 14:10

What are the exact errors you are getting?

1300 calories of pure beef goodness can't be wrong!

Fortran 77 compiler on windows

kewl.jad10-Aug-09 23:59

kewl.jad

10-Aug-09 23:59

hey ,

i have a small application scripted on fortran 77 ,
i need to get a free compiler on windows XP plateform ,which compiles files .f not .for
thanks in advance

Re: Fortran 77 compiler on windows

Chandrasekharan P11-Aug-09 0:24

Chandrasekharan P

11-Aug-09 0:24

Wrong Forum.

Re: Fortran 77 compiler on windows

kewl.jad11-Aug-09 1:49

kewl.jad

11-Aug-09 1:49

Can u plz guide me , where can i post this question?

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