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EMAIL s.w.kraft@netzero.net, WINXP Pro, MFC C++ 6.0
Supposedly one can pass arguments to a class by value or reference, no problem with value. However, code segment below:
//#include <iostream.h>
//Etc.
Workspace called "Cobject"
Create two classes:
Subobject1
Subobject2
Headers:
Subobject1.h
Subobject2.h
At initialize:
Subobject1 Initialize(float a, float b)
(results a,b defined)
Subobject2 Initialize(&a,&b)
(should pass a reference (address) to Subobject2, however,
get an error that says cannot convert float *a to float a
If I change Subobject2.h to Arguments &a, &b, still get error, not sure how to address the problem. According to
literature, should be able to pass arguments to a class
by reference without pointer logic, i.e. & arg to pass reference.
Would appreciate help on this one. Thanks in advance, Sid Kraft s.w.kraft@netzero.net;P
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if I understand correctly, me think you put your & at the wrong place.
Initialize(&a,&b) ( if this is the call ), means you are passing the adress of A and B to Initialize, not the reference to a method which receive the parameters by value.
Maximilien Lincourt
Your Head A Splode - Strong Bad
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Your code is a little unclear. However, it seems that what you are trying to do is this.
For Subobject1
Declaration
void Initialize(float a, float b)
Call like
float a = 1.0;
float b = 2.0;
Initialize(a, b);
For Subobject2
Declaration
void Initialize(float& a, float& b)
Call like
float a = 0.0;
float b = 0.0;
Initialize(a, b);
i.e., for references you call the function in the same way. But if you change the values of a and b inside Initialize, they will have changed outside too.
Kevin
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Hello everyone.
I am a very new member to this forum, and also very new to Windows programming.
I am challenging myself to building my own text editor. However, I don’t know where to start. So, I am looking for a source code for a simple text editor with functions like “Open, Save, Save As, Copy, Cut, Paste, About.” I don’t think any text editor in the world lacks these very basic functions. On that basic structure I plan to build and develop. I’d appreciate every bit of help in this matter because I am a very new programmer and I am barely scratching the surface.
I am not completely sure that I am even posting my request in the correct forum on this site, but I use Visual C++ 6.0 to do the little Windows Programming I know how to do. So, I figured I’d post my request here. I appreciate your kindness in advance 
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depends how deep you want to make your own text editor; do you want to handle everything ( drawing the words, handle keyboard event, ... ) or simply have a simple text editor.
for the former, I would consider learning a lot of C++/Win32/MFC programming before, it's a big task.
if it's the later, have a look at CRichEditCtrl which IS a MFC text editor control ( with basic functionality ); you simply create a MDI ( or SDI ) with a CRichEditView ( or something like that ) as the view type ( from the new project wizard ).
after that, you have to handle the save, load, ... fonts and color, and other stuff.
There are a lot of exmaple on this site, search for them.
Maximilien Lincourt
Your Head A Splode - Strong Bad
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I would really suggest you read this entire tutorial:
http://winprog.org/tutorial/
But what you really need are these two pages:
http://winprog.org/tutorial/app_two.html
and
http://winprog.org/tutorial/app_three.html
wWw.KruncherInc.cOm
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I would suggest looking at the articles at http://www.codeproject.com/editctrl/[^]
Start by hacking the windows edit control and getting a feel for how Windows implements an edit control.
Don't concern yourself with Open, Save, Save As commands as of yet...those are easy to add once you have an basic control built. Maybe not so much Copy, Paste, but i'd first get the caret moving about and inserting, deleteing characters down and bug free first.
Cheers
It's frustrating being a genius and living the life of a moron!!!
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Has anyone used the MS ActiveX control - Record Navigation Control in an MFC app?
I like the look/functionality of the RecNavControl (like the record nav control in MS Access - VCR-type buttons), but I want to use this control not with an (imbedded) database, but just as a generic control.
I want to use this rec nav control to navigate a "linked-list" structure and display what current "link" i'm on, ability to jump to the "beginning of list", etc...
I'm having some problems with tying into the control as it just acts disabled and I can't do a "SetWindowText(szStr)" to fill the text window.
Any ideas? Any references out there? Thanks,
Johnny
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Hi,
How would I supress a warning for a certain variable which I know is unused? On other compilers I can use something like #pragma unused (variableName).
Thanks
Hua-Ying
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UNUSED(x);
UNUSED_ALWAYS(y);
UNREFERENCED_PARAMETER(z);
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04
Within you lies the power for good - Use it!
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Thanks!
UNREFERENCED_PARAMETER(z); worked for me.
Hua-Ying
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Another approach is the following:
void function(type1 parm1,type2 )
{
}Commenting out the parameter name in the argument list guarentees that the parameter isn't used, since there is no longer a definition for it (the compiler will issue an error message otherwise).
Software Zen: delete this;
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Hi,
Here is the scenerio.
sql server runs on computer myserver.
The application myapp (VC++ MFC) runs on another computer on LAN appComputer.
I need to restore the db mydb from myapp.
The back file is on appcomputer. So, when db tries to restore from thsi file it cannot access it cuz of security.
So i create a share in code myshare on teh folder containing the backupfile.
The Db still cannot access it.
But if I right click on teh folder and go to security taba nd add everyone to the list and provide full control to everyone it works fine.
Now am using sharing api fucntion netshareadd to add the share on the folder temporarily.
i went through the documentation of netshareadd but it does not provide any hints on how to add evryone to the security list in code.
sdoes anyone has idea how to do this??
thnaks in advance
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Have you considered either the BACKUP DATABASE or SELECT INTO commands?
http://www.warriorforum.com/forum/topic.asp?TOPIC_ID=28236
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
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well the database is already backup to a file. So backup datatbase is a no no.
Select Into returns one row of results, again unrelated to my problem.
What I want is to restore my database froma backup file on a remote machine on LAN.
This is doen by stored procedure using Restore Database blah from disk = path
now if path specifies a computer on LAn then it is like \\servername\drivename$\folder\file.dat
here SQL Server gives up since it does not have access to that drive.
So to provide access i create a temporary share on the said folder using sharing api function netshareadd.
It works fine but Server still cannot access cuz only certain people have rights.
So if i manually right click on the folder and go to security tab and add everyone to the list, SQL Server is happy, since it has access not.
The problem is how to do the same step in code.
Any suggestions???
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So how about the RESTORE DATABASE command?
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
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That's exactly what doe snot work!
when a RESTORE DATABASE is given a path to file on remote computerr it fails because SQL Server does not have access to the folder!!!
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Sorry, I did not see that (unhighlighted) command mentioned in your second post.
This sounds more like a SQL issue rather than a C++ issue. Do you agree? Have you consulted the microsoft.public.sqlserver.* newsgroups?
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
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I am trying to add a bit map to a cbutton. In the resource editor i do set the bitmap property to true. On the init dialog this is what i have.
CButton* pButton = (CButton*) GetDlgItem(BUTTON_ID);
CBitmap bmp;
bmp.LoadBitmap(BITMAP_ID);
HBITMAP hBmp = HBITMAP(bmp);
pButton->SetBitmap(hBmp);
the bitmap doesnt appear any suggestions? What am i doing wrong???
Thanks in advance
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Try this one.
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
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thats a subclass and thats what i dont wanna do. I also tried adding the style BS_BITMAP thru the setwindowlong just to makesure the style was being set but no luck.....
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Perhaps bmp is going out of scope and thereby causing badness? Also see my article, FooButton[^].
/ravi
My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com
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setbitmap takes an object so i dont think that could be a reason. But may be its worth trying.
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sorry ravi, it was a scoping issue but i am still not clear why. the CBitmap bmp; is required to be a class level member. I was assuming that when we call a setbitmap on the button and pass a HBITMAP to it, a copy should be sent and there should be no scoping issue.
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I'm fairly new to MFC and have been tasked with migrating an app from VC++ 6.0 to VC++ 7.0 (vs.net). For those who have done this before, are there any things I should watch out for or know beforehand ?
I was simply going to create a new solution in VS.NET, import my VS6.0 projects into it, and then fix each thing the compiler complains about. Is this the right way to go about it ?
thanks in advance
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