Capturing Screen shots from a Dll - C / C++ / MFC Discussion Boards

act_x21-Jan-05 5:25

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)

Read the files or folders of a text file and display their icons?

lillah21-Jan-05 0:24

lillah

21-Jan-05 0:24

Hi,
I try to create a dialog where user can select folders or files, these ones would be written in a configuration file, till here, no problem.
But, I want that these files, when added, were be displayed their icons on the dialog and when the user opens the dialog again, can view these folders or files and can add or delete them.
So, what I want is the app read the text file and display the icons, is it possible, or have I to resign myself with display the path with text only? Is there some function to do this?

Thanks a lot!

Re: Read the files or folders of a text file and display their icons?

David Crow21-Jan-05 10:12

David Crow

21-Jan-05 10:12

Use SHGetFileInfo(). Look at the hIcon and iIcon members of the SHFILEINFO struct.

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

Re: Read the files or folders of a text file and display their icons?

lillah21-Jan-05 12:34

lillah

21-Jan-05 12:34

Thanks!!!! Big Grin | :-D

This is what i'm looking for!

CString to std::string

Patrik Mueller21-Jan-05 0:10

Patrik Mueller

21-Jan-05 0:10

Hi all,

I'm trying my first unicode application. Now I have the problem how to convert from CString (the unicode variant) to std::string.

Anyone has a hint?

Thanks,

Patrik

Re: CString to std::string

Mircea Puiu21-Jan-05 0:32

Mircea Puiu

21-Jan-05 0:32

Have a look here:
http://weblogs.asp.net/slippman/archive/2004/06/02/147090.aspx[^]

SkyWalker

Re: CString to std::string

Patrik Mueller21-Jan-05 0:53

Patrik Mueller

21-Jan-05 0:53

Hi,

thanks for the link - but I'm still a VC6 user ;-(
Do you have a better idea??

Thanks,

Patrik

Re: CString to std::string

Mircea Puiu21-Jan-05 1:09

Mircea Puiu

21-Jan-05 1:09

First of all:
1) CString --> this is a string wrapper class, which is part of the Microsoft Foundation Classes(MFC).
2) std::string --> this is a Standard C++ Class wrapping a char string. It is part of the Standard Template Library, or STL.

The conversions between them are:

<br />
CString cs("Your text");<br />
std::string s((LPCTSTR)cs);<br />
<br />
std::string s("Your text");<br />
CString cs(s.c_str());<br />

SkyWalker

Re: CString to std::string

Patrik Mueller21-Jan-05 1:24

Patrik Mueller

21-Jan-05 1:24

Thats clear - but try that within an unicode environment!

my last idea was that:

std::string result;
int i;
char *pmb = (char *)malloc( sizeof( char ) );

for (int j = 0; j < theString.GetLength()+1; j++)
{

i = wctomb( pmb, theString.GetAt(j) );
if (i != 1 && i != -1)
result.append(pmb);
}

But no success ;-(

Re: CString to std::string

Mircea Puiu21-Jan-05 1:38

Mircea Puiu

21-Jan-05 1:38

Try to use ANSI-To-UNICODE and UNICODE-TO-ANSI string conversions:

   <br />
char *ansistr = "Your text";<br />
int a = lstrlenA(ansistr) + 1;<br />
BSTR unicodestr = SysAllocStringLen(NULL, 2*a);<br />
MultiByteToWideChar(CP_ACP, 0, ansistr, a, unicodestr, a);<br />
// Do something with your string, for example<br />
AfxMessageBox(CString(unicodestr), MB_OK, 0); :-)<br />
// Free the BSTR<br />
SysFreeString(unicodestr);<br />

and

<br />
BSTR unicodestr;<br />
// Get you string somehow<br />
SomeFunction(unicodestr);<br />
int a = SysStringLen(unicodestr) + 1;<br />
char *ansistr = new char[a];<br />
WideCharToMultiByte(CP_ACP, 0, unicodestr, -1, ansistr, a, NULL, NULL);<br />
// Do something with your string, for example<br />
AfxMessageBox(ansistr, MB_OK, 0); <br />
// Free the memory after using the strin<br />
delete[] ansistr;<br />
SysFreeString(unicodestr);<br />

SkyWalker

Re: CString to std::string

Maximilien21-Jan-05 2:50

Maximilien

21-Jan-05 2:50

The unicode version of std::string is std::wstring; conversion should be straightforward.

or if you really need to use std::string, I think someone answered that already.

Maximilien Lincourt
Your Head A Splode - Strong Bad

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