Borland vs Microsoft - C / C++ / MFC Discussion Boards

1-Aug-01 23:21

Hi
I have a problem getting to my CDoc member variables from a CDialog.
If i use GetDocument from my view I can get the document variables data but if I open a dialog and tries to get the document data via the view - GetParent->GetDocument - all variables is empty. Why? Is the original document temporarily destroyd while the dialog is active and then restored after the dialog is gone? Is there a way around this or am I making something wrong?

Thanks in advance, Per

Re: CDoc-CView-CDialog

Tomasz Sowinski2-Aug-01 0:56

Tomasz Sowinski

2-Aug-01 0:56

The best solution to solve your problem would be passing the document pointer to dialog. You can add the pointer as a public member of dialog class:

class CYourDialog : public CDialog
{
// ...
CYourDoc *m_pDoc
// ...
};

Before calling DoModal, you should init m_pDoc:

// this assumes that you're opening the dialog
// in one of the view class methods
CYourDlg dlg;
dlg.m_pDoc = GetDocument();
if (IDOK == dlg.DoModal())
{
// ...
}

For more object oriented solution, make m_pDoc a private data member initalized in CYourDlg constructor.

Tomasz Sowinski -- http://www.shooltz.com

CPropertyPage and Titles

1-Aug-01 23:10

Hi,
is there a way to change the title and subtitles of
CPropertyPage objects during run time? thanks.

Re: CPropertyPage and Titles

Tomasz Sowinski2-Aug-01 1:00

Tomasz Sowinski

2-Aug-01 1:00

Are you running in wizard or normal (tab) mode?

Tomasz Sowinski -- http://www.shooltz.com

1-Aug-01 22:57

How can I determine the name of user with which user is logged in into the domain. Also, is it possible to get the domain name in which user is logged in?

Atin.

Re: Login user name

Michael Dunn1-Aug-01 23:50

Michael Dunn

1-Aug-01 23:50

Check out GetUserName(), GetUserNameEx(), and the IADsADSystemInfo interface.

--Mike--
http://home.inreach.com/mdunn/
"Make sure that if you are using a blow torch that you don't set anything on fire."
-- Chris Maunder

Re: Login user name

Serge A. Zhirko2-Aug-01 20:59

Serge A. Zhirko

2-Aug-01 20:59

See HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

The GetUserName function retrieves the user name of the current thread. This is the name of the user currently logged onto the system. But if use this function from working service (when user was alredy logged in) You retrieves user name "SYSTEM" Frown | :(

while current logged in user name be found in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon Wink | ;)

Borland vs Microsoft

Steve Thresher1-Aug-01 22:35

Steve Thresher

1-Aug-01 22:35

I am currently trying to change from using the Borland C compiler to Visual C++ however I have run into a problem. Borlands C compiler allows you to typedef functions, for example typedef BOOL(MYFUNC)(VOID *data) gives you a function that takes a VOID * and returns a BOOL. The Microsoft compiler doesn't appear to like this. Is there any setting you can change to allow this in the Microsoft compiler?

Thanks in advance for any help you can provide.
Steve.

Re: Borland vs Microsoft

Michael Dunn1-Aug-01 22:39

Michael Dunn

1-Aug-01 22:39

You're missing an asterisk:

typedef BOOL (*MYFUNC)(void*);

--Mike--
http://home.inreach.com/mdunn/
"Make sure that if you are using a blow torch that you don't set anything on fire."
-- Chris Maunder

Re: Borland vs Microsoft

Steve Thresher1-Aug-01 23:00

Steve Thresher

1-Aug-01 23:00

No thats not it.

I have a function defined as:

    typedef BOOL(MYFUNC)(DATA *data);
</pre

I then try to use this as follows:

<pre>
MYFUNC somefunction
{
    // Do something with the data passed in
    if (data->flag)
    {
        someotherfunction();
        return(TRUE);
    }

    return(FALSE)
}

The compiler error is 'typedef cannot be used for function definnition'.

I dont think I am going to be able to get around this problem so I would appreciate any ideas on how to change these declarations in a lot of source files quickly. Would a macro or script be able to handle it?

Re: Borland vs Microsoft

Jamie Nordmeyer2-Aug-01 5:41

Jamie Nordmeyer

2-Aug-01 5:41

You define a function pointer data type as:

typedef BOOL (MYFUNC *)(DATA *);
<pre>

which says "Any variable declared as MYFUNC is a pointer to a function that takes a DATA pointer as its parameter, and returns a boolean."

<pre>
MYFUNC func;
DATA d;

d.flag=SOME_FLAG;
if (func(&d))
   MessageBox(NULL, "Success", NULL, MB_OK);

Jamie Nordmeyer
Portland, Oregon, USA

Re: Borland vs Microsoft

Steve Thresher1-Aug-01 23:02

Steve Thresher

1-Aug-01 23:02

No thats not it.

I have a function defined as:

typedef BOOL(MYFUNC)(DATA *data);

I then try to use this as follows:

MYFUNC somefunction
{
    // Do something with the data passed in
    if (data->flag)
    {
        someotherfunction();
        return(TRUE);
    }

    return(FALSE)
}

Re: Borland vs Microsoft

Tim Deveaux2-Aug-01 4:44

Tim Deveaux

2-Aug-01 4:44

> Would a macro or script be able to handle it?

Yes, I think so - except for the fact that now you have to go through all the decls adding brackets around the function name:

#define MYFUNC(fn_name) BOOL(fn_name)(INT *data)
 
MYFUNC(somefunction)
{
    // Do something with the data passed in
    if (*data)
    {
        return(TRUE);
    }
    return(FALSE);
}

I don't have my trusty Stroustrup handy - wonder which compiler is doing the right thing here?

Re: Borland vs Microsoft

Christian Graus2-Aug-01 13:13

Christian Graus

2-Aug-01 13:13

For a second I thought I was logged in to Celebrity Deathmatch !!!

Christian

#include "std_disclaimer.h"

The careful application of terror is also a form of communication.

Eagles may soar, but weasels don't get sucked into jet engines.

Crystal Report 8.0 ...

Hadi Rezaee1-Aug-01 22:30

Hadi Rezaee

1-Aug-01 22:30

Hi,
I'm using Crystal Report 8.0 ...
I need to find a record its Code field is 120 ...
So, first i made the new report with Standard expert ...
Then i choosed all fields that i need ...
But i don't know where i can write SQL !!!
So, please tell me how can i write SQL in my report ...

Thanks,
Hadi Rezaie

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Re: Crystal Report 8.0 ...

2-Aug-01 3:20

for hardcoded values you can use Select Expert from the Report menu or the Select page from the Report Expert. or you can change the query at Database/Show SQL Query

setting the where and the order by part at runtime, set the SQLQueryString property of the Report object (RDC) or SQLQuery property (OCX). use must use the exactly same format as Database/Show SQL Query shows

Re: Crystal Report 8.0 ...

Hadi Rezaee3-Aug-01 17:59

Hadi Rezaee

3-Aug-01 17:59

Hi,
I used of SetSQLQuery, but won't work !!!
m_Crystal.SetSQLQuery("SELECT * FROM PERSON WHERE [CODE] = 1");
What is my wrong ?

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Scrollbar

confalonieri1-Aug-01 22:10

confalonieri

1-Aug-01 22:10

Hi.

I'm trying to manage a listbox vertical scroll bar and I have a problem with the function OnVScroll when I drag the scroll box.

In OnVScroll(), when the first parameter nSBCode is SB_THUMBPOSITION or SB_THUMBTRACK, the second parameter nPos is expected to indicate the position of the scroll box. nPos (which is a UINT) can be cast to an int, and then I realized that after 32768, (int) nPos is -32768 ! Then, (int) nPos increases up to 32768 and then -32768 again !!!

How should I proceed to manage the scroll box position when the range of my vertical scroll bar is over 32768 ?

Thanks.

Re: Scrollbar

Tomasz Sowinski2-Aug-01 1:21

Tomasz Sowinski

2-Aug-01 1:21

You should use CWnd::GetScrollInfo instead of parameters passed to WM_VSCROLL. GetScrollInfo supports 32-bit ranges and positions.

Tomasz Sowinski -- http://www.shooltz.com

how calculate a length of time?

Gérald Mercet1-Aug-01 21:57

Gérald Mercet

1-Aug-01 21:57

I would like to know if i could simply do the difference between 2 COleDateTime variable, if i would know the length of time between them.
m_LenghtOfTime=m_Date2-m_Date1; ?

thanks in advance

gerald

Re: how calculate a length of time?

Tomasz Sowinski2-Aug-01 1:04

Tomasz Sowinski

2-Aug-01 1:04

Yes. m_LengthOfTime should be a COleDateTimeSpan variable.

Tomasz Sowinski -- http://www.shooltz.com

Visual C++

G.S.Gupta1-Aug-01 21:22

G.S.Gupta

1-Aug-01 21:22

Hi there

Please help me for one of my problem.

I want to generate some random numbers and display them in a edit box with a delay of say 1000 Msec.

For this I have created one dialog based project having one edit box and one start button. On press of start button I am using a for loop to generate 10 random numbers, display them one by one in edit box after a delay of 1000 Msec. To my surprise, only last number is displayed in the edit box.
Other numbers are generated but not displayed in the edit box.

Please suggest how to solve this problem ?

Thanks in Advance.
Rose | [Rose]

Re: Visual C++

Tomasz Sowinski2-Aug-01 1:30

Tomasz Sowinski

2-Aug-01 1:30

After m_yourEdit.SetWindowText you should call m_yourEdit.UpdateWindow().

Tomasz Sowinski -- http://www.shooltz.com

GDI+ from June SDK CD ???

Christian Graus1-Aug-01 20:08

Christian Graus

1-Aug-01 20:08

Anyone managed to make GDI+ work fro the June CD ? After figuring out places they have changed function prototypes, I am still left with the following errors:

C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE\PRERELEASE\GdiplusInit.h(32) : error C2065: 'ULONG_PTR' : undeclared identifier
C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE\PRERELEASE\GdiplusInit.h(32) : error C2065: 'token' : undeclared identifier
C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE\PRERELEASE\GdiplusInit.h(32) : error C2165: 'left-side modifier' : cannot modify pointers to data
C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE\PRERELEASE\GdiplusInit.h(32) : error C2071: 'NotificationHookProc' : illegal storage class
C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE\PRERELEASE\GdiplusInit.h(33) : error C2146: syntax error : missing ')' before identifier 'token'
C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE\PRERELEASE\GdiplusInit.h(33) : error C2165: 'left-side modifier' : cannot modify pointers to data
C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE\PRERELEASE\GdiplusInit.h(33) : error C2071: 'NotificationUnhookProc' : illegal storage class
C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE\PRERELEASE\GdiplusInit.h(33) : error C2059: syntax error : ')'
C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE\PRERELEASE\GdiplusInit.h(86) : error C2059: syntax error : 'const'
C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE\PRERELEASE\GdiplusInit.h(95) : error C2146: syntax error : missing ')' before identifier 'token'
C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE\PRERELEASE\GdiplusInit.h(95) : warning C4229: anachronism used : modifiers on data are ignored
C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE\PRERELEASE\GdiplusInit.h(95) : error C2182: 'GdiplusShutdown' : illegal use of type 'void'
C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE\PRERELEASE\GdiplusInit.h(95) : error C2059: syntax error : ')'
Error executing cl.exe.

My code does not call the functions in GDIPlusInit ( it's a COM component that assumes GDI+ has been started ). It works at work with the old SDK, but I did a full install of the new one and apparently it does not know what a ULONG_PTR is, and if I #define it myself all compiles fine. This should not be, surely ?

Also, I've searched and there is nonew dll ( at least not on my hard drive after a full install ). Is there no new dll ? How is this possible ? Where is it hidden ?

Thanks to anyone with constructive suggestions ;0)

Christian

#include "std_disclaimer.h"

The careful application of terror is also a form of communication.

Eagles may soar, but weasels don't get sucked into jet engines.

Re: GDI+ from June SDK CD ???

Michael Dunn1-Aug-01 22:47

Michael Dunn

1-Aug-01 22:47

ULONG_PTR is #defined in basetsd.h

--Mike--
http://home.inreach.com/mdunn/
"Make sure that if you are using a blow torch that you don't set anything on fire."
-- Chris Maunder

Last Visit: 31-Dec-99 18:00 Last Update: 31-May-24 8:16

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