C / C++ / MFC Discussion Boards

Re: Abstract member functions - strange phenomenon open to discussion:

Nick Nougat22-Oct-04 7:58

22-Oct-04 7:58

Ah, I see.
That escaped my attention. Quite obvious though, come to think of it. (->silly me)

So the fact that my example code works OK is only by chance and not a regular case and more complicated classes or a release version compile might produce unpredictable results.

Thanks for the comment.
Nick

How can I programmatically install a visual C++ add-in for visual C++?

Behzad Ebrahimi22-Oct-04 5:56

Behzad Ebrahimi

22-Oct-04 5:56

Hi, I want to create an installshield for my Add-in like WndTabs.
http://www.codeproject.com/macro/wndtabs.asp[^]
After copying my add-in to "Microsoft Visual Studio\Common\MSDev98\AddIns" folder, what do I?

Peek stdin

peterchen22-Oct-04 5:50

peterchen

22-Oct-04 5:50

Hi,

Is it possible to "peek" stdin (i.e. check if any data is available) for a Win32 "kind of" console application?

Problem: A thread has to read stdin, but needs to react on an event

we are here to help each other get through this thing, whatever it is Vonnegut jr.
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Re: Peek stdin

David Crow22-Oct-04 6:04

David Crow

22-Oct-04 6:04

See if GetStdHandle(), and ReadConsoleInput() or ReadFile() are of any help.

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

Please help me with MFC Dialogs

Member 214873122-Oct-04 5:22

Member 2148731

22-Oct-04 5:22

Hi, I just made a program and I put a button in the dialog and called it IDAbout I need to get it so that when this button is clicked it open up another Dialog that I have made called IDD_ABOUTBOX. Can any body please help me write a code for the button so that it opens up the about box?

I am using MFC Dialog based project.

Thanks in advance. Smile | :)

Re: Please help me with MFC Dialogs

David Crow22-Oct-04 5:33

David Crow

22-Oct-04 5:33

Have you created a class for the IDD_ABOUTBOX dialog?

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

Re: Please help me with MFC Dialogs

Member 214873122-Oct-04 5:34

Member 2148731

22-Oct-04 5:34

Yes.

Re: Please help me with MFC Dialogs

David Crow22-Oct-04 5:37

David Crow

22-Oct-04 5:37

Ok, have you used ClassWizard to create a handler function for the clicking of the button?

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

Re: Please help me with MFC Dialogs

Buyer122-Oct-04 5:42

Buyer1

22-Oct-04 5:42

Yes I have. Ijust dont know the script to put into:
void CMizfarsProgramstringtestingDlg::OnAbout()
{
// I need the code to put here to get it to open IDD_ABOUTBOX

}

To link it to the About Box.
Thanks

Re: Please help me with MFC Dialogs

David Crow22-Oct-04 5:46

David Crow

22-Oct-04 5:46

Construct an instance of the second dialog and call its DoModal() method.

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

Re: Please help me with MFC Dialogs

Buyer122-Oct-04 5:53

Buyer1

22-Oct-04 5:53

can you dum it down a bit please. I am only starting out with programming so i dont know much. Please can you explain it as if you were explaining to layman.

Re: Please help me with MFC Dialogs

David Crow22-Oct-04 5:57

David Crow

22-Oct-04 5:57

Buyer1 wrote:
can you dum it down a bit please.

I much prefer the phrase "less experienced."

Not knowing what name you gave your dialog class, I can only give you an approximation.

void CMizfarsProgramstringtestingDlg::OnAbout() 
{
    CMyOtherDlg dlg;
    dlg.DoModal();
}

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

Re: Please help me with MFC Dialogs

Buyer122-Oct-04 6:10

Buyer1

22-Oct-04 6:10

First i am sorry about that phrase.
Secondly:
I tried what you told me, but i keep getting this error when i compile:
midl : command line error MIDL1001 : cannot open input file Program.

I dont know what it means.
I put this code in:

CAboutDlg dlg;
dlg.DoModal();

Re: Please help me with MFC Dialogs

David Crow22-Oct-04 6:14

David Crow

22-Oct-04 6:14

Buyer1 wrote:
Secondly:
I tried what you told me, but i keep getting this error when i compile:
midl : command line error MIDL1001 : cannot open input file Program.

Are you doing something with COM? Using AppWizard, what type of application did you opt for, and what other options did you select?

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

Re: Please help me with MFC Dialogs

Buyer122-Oct-04 6:15

Buyer1

22-Oct-04 6:15

Wait that was something else. Blush | :O

Sorry about that.
I got it working how you told me.
Thank you so very much!!! Smile | :)

metadata shell extension handler

elda0122-Oct-04 5:06

elda01

22-Oct-04 5:06

Hi Community,

I want to extend the detail view of the explorer shell to handle video summary information for mp4 files in the summary tab of the advanced property page under XP on an NTFS file system.

This behavior is already included for mp3 and avi files, although mp3 and avi aren't compounded documents. So therefor, I must implement the IPropertySetStorage interface. What do I have to do to implement that interface? Is there an example somewhere?

It is important to me, that the metadata is not stored in an additional NTFS
stream, but inside the mp4 file itself. So I have to handle this by my
own shell extension code. But how, where, when ...

Thanks in advanced,
David

preprocessor defines

Brian van der Beek22-Oct-04 4:03

Brian van der Beek

22-Oct-04 4:03

I have added a define in my Visual Studio .Net configuration. However my #ifdef's do not see the define. Anyone knows how this can be?

Detecting a mouse click outside of a control

RussUK22-Oct-04 2:29

RussUK

22-Oct-04 2:29

Hi,

I have a CDateTimeCtrl which I am growing in size when the focus is set and shrinking back to its normal size when focus is killed.

at the moment the only way I can get the control to lose focus is to set the focus onto another control.

Ideally when the user clicks anywhere outside of the control the focus should be lost and the CDateTimeCtrl shrink back to its normal size, but I can't see how to capture a mouse click on a CDateTimeCtrl.

The ComboBox control obvioulsy does something similar but can I do it with my CDateTimeCtrl?

Many Thanks

Re: Detecting a mouse click outside of a control

Maximilien22-Oct-04 2:50

Maximilien

22-Oct-04 2:50

you could handle the WM_KILLFOCUS message for your control.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Error ???

Larsson22-Oct-04 2:14

Larsson

22-Oct-04 2:14

error C2079: 'm_RealTime' uses undefined class 'CRealTime'

What is this error?

CRealTime is a modless dialog I use from a diffrent dialog and I have not seen this error before. It have work OK but now it happens is there anyone that now what it is?

Re: Error ???

BlackDice22-Oct-04 3:07

BlackDice

22-Oct-04 3:07

if CRealTime is declared in the calling class's header file, you'll need to make a forward class declaration so that the compiler knows that it's a class when it compiles the header. Here's an example:

//forward declaration
class CRealTime;

//calling class's definition
class CCallingClass : public CSomeClass
{
   CRealTime m_RealTime;
   //other stuff
};

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message box problems in a dialog application

Programmer_Chris22-Oct-04 1:59

Programmer_Chris

22-Oct-04 1:59

I am trying to do some data validation on a dialog application and present the user with a message box when the user tries to input invalid data. The test work but when it gets to the point that it is supposed to display a message box, the dialog application greys out as if it no longer has the focus, but no message box is shown and the application hangs. At this point, I have to do the control alt delete to get it to close. Help! Oh this is with Visual C++.net.

Thanks for any help!

Chris

Re: message box problems in a dialog application

V.22-Oct-04 3:20

22-Oct-04 3:20

when should it get called? How do you do it? How and when do you the validating?

this will help all the ones trying the answer your answer Smile | :)

.

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

Re: message box problems in a dialog application

Programmer_Chris22-Oct-04 4:11

Programmer_Chris

22-Oct-04 4:11

The validation is occurring when a user pushes a button on the dialog. The validation is on an edit control. See below.

int Pos;
int NumChars;
BOOL RtnVal=TRUE;
CString strEditText;

CEdit* pEdit = (CEdit*)GetDlgItem(IDC_EDIT1);
pEdit->GetWindowText(strEditText);

NumChars = strEditText.GetLength();

for(Pos = 0; Pos < NumChars; Pos ++)
{
if(!isdigit(strEditText[Pos])&&(strEditText[Pos]!='-')&&(strEditText[Pos]!='.')
{
RtnVal = FALSE;
}
}

if(RtnVal==FALSE)
{
MessageBox("One or more of the values you typed are not numeric!", "Error", MB_ICONERROR | MB_OK);
}
Hopefully this will help you help me!

Thanks for any help!

Chris

Re: message box problems in a dialog application

Tom Wright22-Oct-04 4:24

Tom Wright

22-Oct-04 4:24

First it looks as though your missing a ')' at the end of your if statement.

Programmer_Chris wrote:
if(!isdigit(strEditText[Pos])&&(strEditText[Pos]!='-')&&(strEditText[Pos]!='.')

Second why don;t you do this
Programmer_Chris wrote:
if(!isdigit(strEditText[Pos])&&(strEditText[Pos]!='-')&&(strEditText[Pos]!='.'))
{
MessageBox("One or more of the values you typed are not numeric!", "Error", MB_ICONERROR | MB_OK);
}

Tom Wright
tawright915@yahoo.com

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