Using MFC on Windows XP - C / C++ / MFC Discussion Boards

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Re: Exception handling under XP

Parish8-May-02 5:27

Parish

8-May-02 5:27

Matt,

Thanks. you were spot on. stdafx.h is where delete() is called, in the deinfition of the END_TRY macro. I guess I got confused between standard C++ exception handling and the MFC macros.

I double checked and found that I'd actually been running the debug build on W2K, which explains why it hadn't crashed before (the release build does).

Curiously, and maybe you know the answer to this as well Smile | :)

, in the debug build the message box popped up by ReportError() includes the message:

<path\filename> contained an invalid path

but the release version just has an empty message box with the warning icon and an OK button - no message.

while (!asleep)
code();

Multiple Dialogs

tordyvel6-May-02 7:33

tordyvel

6-May-02 7:33

Where should you put initialization code for a new dialog in my program? The classwizard wont make any OnInitDialog(). I tried to put it in the constructur and even in the WM_CREATE function, but it crashes the program. help... Cry | :((

Re: Multiple Dialogs

KingsGambit6-May-02 7:53

KingsGambit

6-May-02 7:53

Usually it is put in OnInitdialog. I think, your program is crashing due to some other problems.

Re: Multiple Dialogs

Paul M Watt6-May-02 8:01

Paul M Watt

6-May-02 8:01

Are you talking about initializing the data in the window of a dialog? If so, the you do want to place this in the OnInitDialog handler. I think that you should take one more look at the classwizard to see if you can create the OnInitDialog handler for you.

Otherwise manually edit the message handlers and add a handler for the WM_INITDIALOG message.

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

Re: Multiple Dialogs

Tom Archer6-May-02 12:40

Tom Archer

6-May-02 12:40

You need to be more specific on some issues:

tordyvel wrote:
Where should you put initialization code for a new dialog in my program?

That depends entirely on the data and when it's being used.

tordyvel wrote:
The classwizard wont make any OnInitDialog().

What do you mean by this? In Visual C++ .NET, any dialog's created from a dialog template do not by default have OnInitDialog handlers. Is this what you mean? If that is the case, you can add the handler from the dialog class' Properties dialog. If not, you need to let us know what you mean when you say that the Class Wizard "wont make any OnInitDialog".

tordyvel wrote:
I tried to put it in the constructur and even in the WM_CREATE function, but it crashes the program. help

How exactly does it "crash". GPF? ASSERT? We need more details if someone is going to be able to help you.

Cheers,
Tom Archer
Author - Inside C#, Visual C++.NET Bible

A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the af

Presentation question

HenrikO6-May-02 7:03

HenrikO

6-May-02 7:03

Hi I have made an database application that works with a lot of different data.
I would now like to make a new window that should be able to show calculation results based on this data.. I wonder what kind of View should I use
( I would like to put the data in some kind of grid) note i would not like to use CRecordView..

Could someone please help this Rookie Wink | ;)

Best regards

Henrik

Re: Presentation question

Rama Krishna Vavilala6-May-02 7:09

Rama Krishna Vavilala

6-May-02 7:09

You can either use and activeX control like MSDataGrid, Hierarchial data Grid etc. or you can Use Chris Maunder's grid available in this site.

Using MFC on Windows XP

6-May-02 6:55

I am attempting to "port" an mfc application to windowsXP and everything runs fine, but there are a few finer points of the UI that aren't correct.

For example:
The menu background color and the toolbar button face colors aren't correct. They are darker than they should be (but the gripper is correct). Also, the 3d bevel along the bottom edge of the lowest toolbar looks different on the gripper than on the rest of the toolbar.

I've written a manifest and that gives me the new button, scrollbar, etc. style, but the affore mentioned issue remains.

Has anyone seen an article from Microsoft addressing this issue? (I searched MSDN to no avail.) Any guidance would be appreciated.

Re: Using MFC on Windows XP

Andrew Peace6-May-02 11:09

Andrew Peace

6-May-02 11:09

Use the TBSTYLE_TRANSPARENT flag:

if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT | TBSTYLE_TRANSPARENT) ||
    !m_wndToolBar.LoadToolBar(IDR_MAINFRAME))
{
    TRACE0("Failed to create toolbar\n");
    return -1;      // fail to create
}

HTH

--
Andrew.

Re: Using MFC on Windows XP

7-May-02 4:22

The TBSTYLE_TRANSPARENT style flag makes no difference.

There's a subtle difference in the background color in my MFC application and Windows Explorer, Internet Explorer, Movie Maker and a few other applications that seem to be more targeted for XP. Let me point out that the toolbars in Visual Studio, all of the Office XP products, WordPad, Notepad, etc. are NOT the same color as the first set of apps that I mentioned. My application shares their colors, not what I'd consider the more correct colors.

Open a MSWord app into my window ?

6-May-02 6:48

How to open the MSWord application, by automation, into my own window ?
Thanks. Confused | :confused:

Re: Open a MSWord app into my window ?

6-May-02 6:49

Get the Path of winword.exe in your computer and then Through Winexec function all that exe with it's path

Samir Sood

Re: Open a MSWord app into my window ?

6-May-02 6:50

Get the Path of winword.exe in your computer and then Through Winexec function call that exe with it's path

Samir

Re: Open a MSWord app into my window ?

KingsGambit6-May-02 8:01

KingsGambit

6-May-02 8:01

To opne word in your MFC application, first you have to create an application which supports Doc/View architecture. Then use COleDocument instead of usual CDocument class. Find out the help for COleDocument. If still u find it difficult, then send me a mail.

When i press my checkbox, no check appears...

6-May-02 6:43

I have made this checkbox on my app. It's a non MFC app. it just get light gray when i press it and turns white again when i release, what do i do?

Thankyou

Re: When i press my checkbox, no check appears...

Tim Smith6-May-02 6:50

Tim Smith

6-May-02 6:50

Either BS_AUTOCHECKBOX has not been specified in the style or you have code that is resetting the state.

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

Re: When i press my checkbox, no check appears...

6-May-02 6:59

Oh, thankyou Smile | :)

It was the AUTOCHECK Smile | :)

One more Q :=) How do i check the box myself?

6-May-02 7:05

What function/message shall i use?

Re: One more Q :=) How do i check the box myself?

Tim Smith6-May-02 7:48

Tim Smith

6-May-02 7:48

For non-MFC apps, look at the BM_GETCHECK and BM_SETCHECK messages.

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

Thankyou

6-May-02 8:03

Thankyou

MCSD question

6-May-02 5:24

I am planning to write the distributed C++ MCSD exam. Now I noticed that the books have all been discontinued (the MS Press books for it), but the exam isstill there and is not listed amonst exams that will be discontinued. Do you guys think that this exam will be around in the 6 months or so, or do you see it phase out within this year?

Switch views in SDI using MFC extention DLL Classes

Dave Loeser6-May-02 5:19

Dave Loeser

6-May-02 5:19

Hey guys, I've got one that I hope someone can help with:
Over on codeguru.com there is an article titled Separating the views of an MDI application into different DLLs

What I'm trying to do is create this same fucntionality within a SDI application. This app is workflow based and using an MDI just doesn't work for this type of application.

Here's some of what I have; In my DLL, I have exported one function:

extern "C" AFX_EXT_API UINT Init(CString *strLabel,CRuntimeClass **pRunTimeClass)
{
    new CDynLinkLibrary(View1DLL);
    *pRunTimeClass = RUNTIME_CLASS(CTestView);
    *strLabel = "View 1";		
    return 0;
}

In my test application I have a menu that will call this method when selected:

void CMainFrame::OnViewSwitchtodll() 
{
HINSTANCE hDLL;     
LPDLLFUNC lpfnDllFunc;   
UINT  uReturnVal;
CString strLabel;
CRuntimeClass* runtimeclass;
    
    hDLL = LoadLibrary("View1.dll");
    lpfnDllFunc = (LPDLLFUNC)::GetProcAddress(hDLL,"Init");
    if (!lpfnDllFunc)
    {
        FreeLibrary(hDLL);       
    }
    else
    {
	uReturnVal = lpfnDllFunc(&strLabel,&runtimeclass);
	CAADoc* pDoc = (CAADoc*)this->GetActiveDocument();
	pDoc->SwitchToView(runtimeclass);
    }
}

This loads up the DLL grabs a function pointer to the Init function exported in the DLL and then passes the runtimeclass to the SwitchToView() in my Document class (this was taken from an article on CodeProject).

When I step into SwitchToView the runtimeclass object appears to be fine... and I do not receive errors... but the mHwnd of the runtimeclass is ??? in the Variable inspector during debug.

I've come to the point where I need someone else to take a look at this - so any help?

Thanks in advance,

Dave "Dak Lozar" Loeser

Removing the scroll bars

6-May-02 5:09

I have two views in my application . One is rich edit view and one is edit view . They are split using the splitter windows . But the edit view by default has horizontal and vertical scroll bars associated with it. How to get rid them and make them auto vertical and horizontal scroll bars. I have overriden the precreatewindow function of edit view with the following code
cs.style &= (WS_CHILD | WS_VISIBLE );
cs.style &= ~(WS_HSCROLL);
cs.style &= ~(WS_VSCROLL);
cs.dwExStyle &= ~(WS_EX_RIGHTSCROLLBAR);
but to no avail . Can anyone suggest a solution Smile | :)

Getting a file from a website

derfel6-May-02 5:05

derfel

6-May-02 5:05

Hi,

I'd like to know if anyone can give me some tips about how to programme in C++ a simple class for downloading a file from a web site, for example an image file. I want to incorporate this class into a project, so it does not need any flashy GUI or anything similar.

If possible, it would be good to avoid MFC classes because I need portability across windows/linux. My network programming is not up to scratch for this project that I have set myself. Frown | :-(

Can one use an HTML GET call? Do I have to basically write a ftp client?

Any hints, tips, links, or book references would be great! I've already had a look on the web, but most implementations seem to use MFC

Thanks,

James

Re: Getting a file from a website

Ravi Bhavnani6-May-02 5:10

Ravi Bhavnani

6-May-02 5:10

Here you go:

bool downloadUrlToFile
  (CString strUrl,        // url
   CString strFilename)   // local file
{
  // Download the file if it doesn't exist
  HRESULT hResult = ::URLDownloadToFile (NULL, strUrl, strFilename, 0, NULL);
  return (hResult == S_OK);
}

Also see my WebResourcrProvider article.

/ravi

"There is always one more bug..."
http://www.ravib.com
ravib@ravib.com

Last Visit: 31-Dec-99 18:00 Last Update: 6-Oct-24 18:28

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