C / C++ / MFC Discussion Boards

Mircea Puiu21-Jan-05 5:07

21-Jan-05 5:07

What do you mean, converting a window derived class to a handler ?!?

Maybe you want to get a handler to the window? That's already available in m_hWnd!

SkyWalker

Re: CDialog to HWND

Ravi Bhavnani21-Jan-05 5:29

Ravi Bhavnani

21-Jan-05 5:29

You can't "convert" a CDialog to a HWND, but you can access it's window handle by calling GetSafeHwnd().

/ravi

My new year's resolution: 2048 x 1536
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Can VC++ 6 use the library created by unix compilier like g++?

tttyip21-Jan-05 4:20

tttyip

21-Jan-05 4:20

I used unix g++ to compile a lapack library, the result library is in .a extension.
Could I use it in window VC++?
thanks

Re: Can VC++ 6 use the library created by unix compilier like g++?

Ravi Bhavnani21-Jan-05 5:31

Ravi Bhavnani

21-Jan-05 5:31

No. The format of a Windows .lib is not the same as a .a. (Neither is a .dll the same as a .so).

/ravi

My new year's resolution: 2048 x 1536
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How to use and link Clapack in visual c++

tttyip21-Jan-05 4:18

tttyip

21-Jan-05 4:18

Does anyone has experience in using clapack in visual c++ 6?
Could you teach me how to link it and use it in VC?
thanks

Re: How to use and link Clapack in visual c++

Ravi Bhavnani21-Jan-05 5:34

Ravi Bhavnani

21-Jan-05 5:34

Was this[^] link not helpful?

/ravi

My new year's resolution: 2048 x 1536
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Setting Background Colour of a text

Pazzuzu21-Jan-05 4:14

Pazzuzu

21-Jan-05 4:14

Hi Guys,

Iam working on Vc++, & came across a problem.Hope someone could help!.

Iam Using device Context for diplaying things to the view.

Initially,I write a "text" to the view using "TextOut" method - See Code:

& Then using the "BRUSH" object to fill the rectangle with that colour,using "FillRect" method.Now the "text" which was displayed in the same postion before is not Visible anymore .

My need ,is after writing a "Text" to the view & filling the rectangle containing the text with a colour,want the underlying "text" to be visible(which is not the case now).

Ofcourse,I know that If I set the BackgroundColour atfirst & then write the "text" to the screen,then the "text" will be visible.

But I would not be able to do so co's of some restrictions in my Project...

I want the text "Shading test" to be displayed with the blue background colour.Constraint being,I can't Fill the rectangle with the colour & then draw the text.....

Would be nice if someone could suggest something to do in this regard with respect to the code below.

Thanks......

pDC->SetBkMode(TRANSPARENT);
CRect rect;
GetClientRect(rect);
rect.SetRect(0,0,800,800);
pDC->Rectangle(CRect(0,0,800,800));

SIZE size;
size.cx = 1000;
size.cy = 1000;
SetScrollSizes(MM_TEXT,size);

pDC->TextOut(50,20,"Shading Test");

CRect rect1;
rect1.SetRect(10,10,300,100);
pDC->Rectangle(CRect(10,10,300,100));
CBrush brushBlue(RGB(240,248,255));
CBrush* pOldBrush = pDC->SelectObject(&brushBlue);
pDC->FillRect(rect1,&brushBlue);

Re: Setting Background Colour of a text

Antony M Kancidrowski21-Jan-05 4:51

Antony M Kancidrowski

21-Jan-05 4:51

I suggest that you rework your code so that you can fill the background before writing the text out!

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

Folder List

act_x21-Jan-05 3:55

act_x

21-Jan-05 3:55

In one of my apps I need to present the user with a Directory structure (like in windows explorer) . I want to allow the user to only select the folder . Based on this I need to do further actions . Can the usual CFileDialog class serve this purpose ? .

Re: Folder List

Maximilien21-Jan-05 4:38

Maximilien

21-Jan-05 4:38

use ShBrowseForFolder

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: Folder List

act_x21-Jan-05 5:25

act_x

21-Jan-05 5:25

OnDisplay()<br />
{<br />
char str[MAX_PATH ];<br />
BROWSEINFOA lpbi;<br />
lpbi.hwndOwner=this->m_hWnd;<br />
lpbi.pszDisplayName=str;<br />
lpbi.lpszTitle="Test";<br />
lpbi.ulFlags=0;<br />
CoInitialize(NULL);<br />
OleInitialize(NULL);<br />
SHBrowseForFolder(&lpbi);<br />
<br />
<br />
}

For some reason the call to ShBrowseForFolder crashes .

Re: Folder List

wb21-Jan-05 7:06

21-Jan-05 7:06

I found something like this,
and it works for me...

CoInitialize(0);
   BROWSEINFO bi;
   char cc[MAX_PATH];
   bi.hwndOwner=m_hWnd;
   bi.pidlRoot=0;
   bi.pszDisplayName=cc;
   bi.lpszTitle="";
   bi.ulFlags =0;
   bi.lpfn =0;
   bi.iImage=0;
   
   LPITEMIDLIST p;
   p=SHBrowseForFolder(&bi);

   if(!p)
      return;

   SHGetPathFromIDList(p,cc);

   SetDlgItemText(IDC_E_PATH,cc);

   IMalloc *pm;
   SHGetMalloc(&pm);   
   pm->Free(p);

Re: Folder List

Anonymous21-Jan-05 8:05

Anonymous

21-Jan-05 8:05

Thank you for the help

I wasnt doing this
bi.pidlRoot=0;
hence the crash .

Another question

using LPITEMIDLIST p how do I get the FilePath ?

Re: Folder List

David Crow21-Jan-05 10:02

David Crow

21-Jan-05 10:02

act_x wrote:
Can the usual CFileDialog class serve this purpose ? .

Yes, but SHBrowseForFolder() is going to be easier.

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

[Q] Updating an control inside other control handler problem...

rbid21-Jan-05 3:31

rbid

21-Jan-05 3:31

Hello,

Setting the edit box text via SetWindowText does not work inmediatelly if you set it from one of the handlers of your dialog. Instead, the update will happen only after the handler ends its run.

void CDemoDlg::OnNewBnClicked()
{
    m_newBtn.EnableWindow(FALSE);
    GetDlgItem(IDC_STATUS_EDIT)->SetWindowText("New"); <font color=#AA0000>// Change here to IDC_STATUS_STATIC</font>
    ...
    <font color=#AA0000>// Some code that takes few msec to end</font>
    ...
    m_newBtn.EnableWindow(TRUE);
}

If I replace the Edit Control with a static control, the text is updated inmediatelly. (Before the button control is enabled)

I guess that the answer is the use of SendMessage and PostMessage.

Is there a way to update an edit control inmediatelly and not wait till the handler ends?

Any hint? (I need an edit control there)

Another example:

void CDemoDlg::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
    HWND hwnd = pScrollBar->GetSafeHwnd();
    if (hwnd == m_mainCursorSliderCtrl.GetSafeHwnd())
    {
        int pos = m_mainCursorSliderCtrl.GetPos();
        if (pos != m_mainCursorPosition)
        {
            CString text;
            m_mainCursorPosition = pos;
            text.Format("Main:%d", pos)
            GetDlgItem(IDC_STATUS_EDIT)->SetWindowText(text);
            GetDlgItem(IDC_STATUS_STATIC)->SetWindowText(text);
            UpdateListControlData();
            }
        }

    }

    CDialog::OnHScroll(nSBCode, nPos, pScrollBar);
}

The list control and IDC_STATUS_EDIT is update only when the slider-bar stops, while the IDC_STATUS_STATIC is updated on real-time.

-- Ricky Marek (AKA: rbid)
-- "Things are only impossible until they are not" --- Jean-Luc Picard

My articles

How to create nested directories?

Monisankar21-Jan-05 3:04

Monisankar

21-Jan-05 3:04

Is it possible to create nested directories using CreateDirectory()?How exactly?

Re: How to create nested directories?

C^hris L^osinger21-Jan-05 3:23

C^hris L^osinger

21-Jan-05 3:23

CreateDirectory(top);
CreateDirectory(top + "\\subdir1");
CreateDirectory(top + "\\subdir1\\+subdir2");

Image Toolkits | Image Processing | Cleek

Capturing Screen shots from a Dll

mcsherry21-Jan-05 2:34

mcsherry

21-Jan-05 2:34

Hi all,

I've written a program (with bits taken out of various Articles on here) which captures the screen and then saves the screen shot as a bitmap.

I've got this working as a standalone executable however I now need to be able to do this from within a dll. The problem I've got is that as soon as I get to the line in the dll where I use a pointer to the CWnd* from the calling application I get a crash. At first I thought it was case of the CWnd pointer going out of focus so I tried GetSafeWnd but I get the same error (the reason I'm passing this in is that I need it for the creation of my dc and also to get the screen size).

Does anyone know what I'm doing wrong and how to correct it (I'm using MS VC++ 6.0)

TIA,
Andy

Re: Capturing Screen shots from a Dll

mcsherry21-Jan-05 4:11

mcsherry

21-Jan-05 4:11

managed to solve this by not passing a CWnd pointer into the dll. WHat I've done is to call GetDesktopWindow within the dll, this returns a valid CWnd* which I can use

Re: Capturing Screen shots from a Dll

Antony M Kancidrowski21-Jan-05 4:43

Antony M Kancidrowski

21-Jan-05 4:43

The crash occurs as thread local storage is used for CWnd objects. It is possible to pass the windows HWND (using CWnd::GetSafeHwnd()) and then wrap that up in a new CWnd object within the DLL if desired.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

Protect against Spy-Software?

FreewareFire21-Jan-05 2:13

FreewareFire

21-Jan-05 2:13

Hi,

i'm currently working on a game trainer. My problem is, that i want to protect it against
Spy-Software like spy XP, ArtMoney and other trainer cheating software. Also i want to protect it from beeing disasemmbled. Does anyone has some piece of code that can detect if a Spy-Software try to open my trainer. I'm currenty using the FinWindow to close a spy-prog. But i have to know the window title. I want to protect my prog against every spy-software - against every version and not with knowing the window title. My aim is it to detect if another process hooks my trainer or tries to cheat my trainer. Anyone has a source or link?

i forget: i use C++!

Thx!

TJ20

JR20

Re: Protect against Spy-Software?

Antony M Kancidrowski21-Jan-05 4:33

Antony M Kancidrowski

21-Jan-05 4:33

JR20 wrote:
Also i want to protect it from beeing disasemmbled.

It will always be possible to reverse engineer any executable if you have access to it.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

Re: Protect against Spy-Software?

FreewareFire21-Jan-05 5:56

FreewareFire

21-Jan-05 5:56

Thx for your reply!
Yes, but you can make it more complicated. I not want to protect it against "real" hackers. Only against hobby proggers. Does anyone has a idea how to prevent spy xp to cheat my trainer? Or to detect any spy-software? Thx!

JR20

List all registry values in a key

jonavon blakly21-Jan-05 1:55

jonavon blakly

21-Jan-05 1:55

I need to be able to list all of the registry values in a specific key.

Re: List all registry values in a key

Antony M Kancidrowski21-Jan-05 4:40

Antony M Kancidrowski

21-Jan-05 4:40

You use RegEnumValue[^]

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

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