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To complete your task, have a look also at
CreateFile, WriteFile, CloseHandle WIN32 functions.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
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I realise he's using Win32 ( I suspect simply because he has the express edition ), but he's not using C. What's wrong with file streams ?
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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Christian Graus wrote: What's wrong with file streams ?
Nothing, actually.
On the other hand, plain WIN32 API isn't that bad.
As matter of personal taste, I prefer plain C I/O API (fopen,...) whenever my application is, by design, not OO (for instance, simple test applications).
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
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Use any of the below to retrive text from your edit box
CString strWindowText;
editBoxObject.GetWindowText(strWindowText);
GetDlgItem(ID_OF_THE_EDIT_BOX)->GetWindowText(strWindowText);
then create an CStdiofile object
then the WriteString(strWindowText) function of CStrdiofile to save the text into disk
Rgds
Sivan
http://www.ktsinfotech.com
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He's using Win32, this is MFC code.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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Hey,
please help me. I've written a ActiveX-Control. How can I transfer data between the control and propertypage. I know the DDP Makro, but with this makro I can only transfer values from controls. I need to transfer "calculated" value. Is there a function to store/transfer data from propertypage to the membervars in the control?
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Hi All,
I want to detect which antivirus and firewall is installed on my computer.
What all I know is WMI can be used, but don't know the Interface or function.
Thanks.
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I also suggest to take a look to the registry, it contains the required informations.
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I'm using the familiar CString in my project. When I see its definition I see it as the following
typedef ATL::CStringT< TCHAR, StrTraitMFC_DLL< TCHAR > > CString;
in the file afxstr.h.
I was thinking what CString has to do with ATL here?
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well, it IS part of the ATL namespace... :p
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MFC CString is typedefed as typedef ATL::CStringT< TCHAR, StrTraitMFC_DLL< TCHAR > > CString;
Come online at:-
jubinc@skype
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Starting with VC7, some utility classes were changed to be shared between ATL and MFC to reduce code duplication.
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Suppose I have a HWND from enumerating the top level windows, how can I replace the Device Context of the drawing process of this window, so that I can get a snapshot of this window?
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Do you want to draw on the window of other programs?
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No, I want to get a snapshot of another application, for example, to make a album of all the running applications
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I tried to use CWnd::GetDC(), and select a CBitmap created by my own, then call CWnd::RedrawWindow(), after that, I suppose the content in CBitmap should be the window, but it failed.
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This isn't tested, or even compiled, just quickly typed up...
CClientDC dcOther (GetDesktopWindow ());
CRect rc;
::GetWindowRect (hWndToClone, &rc);
CBitmap bmpTemp, *bmpOld;
CDC dcClone;
dcClone.CreateCompatibleDC (&dcOther);
bmpTemp.CreateCompatibleBmp (&dcOther, rc.Width (), rc.Height ());
bmpOld = dcClone.SelectObject (&bmpTemp);
dcClone.BitBlt (0,0, rc.Width (), rc.Height (), &dcOther, 0,0, SRCCPY);
dcClone.SelectObject (bmpOld);
and now dcClone should hold a copy of the contents of the first window - or at least what it shows on the screen.
You should look at the very useful article by PJ Arends: Image Viewer[^].
Good luck,
Iain.
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Really thanks, I tried this, the rect is right, but the contents is from the corresponding top level windows, do i need to bring the window to top, and then use this method, but if so, the orders of the windows will be totally ruined.
<br />
CDC dc;<br />
CDC* pDC = pWnd->GetDC();<br />
CRect rc;<br />
pWnd->GetWindowRect(rc);<br />
dc.CreateCompatibleDC(pDC);<br />
CBitmap bmp;<br />
bmp.CreateCompatibleBitmap(pDC, rc.Width(), rc.Height());<br />
HBITMAP bmpOld;<br />
bmpOld = (HBITMAP)dc.SelectObject(bmp);<br />
dc.BitBlt(0, 0, rc.Width(), rc.Height(), pDC, 0, 0, SRCCOPY);<br />
CxImage imgSnapshot;<br />
imgSnapshot.CreateFromHBITMAP(bmp);<br />
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Yes, this is a screen capture.
Unfortunately, unless the window is visible, window's won;t actually bother sending a WM_PAINT to it, so it won't bother to redraw (this may not be the truth under Vista).
Which is what the WM_PRINT message is for. But as you said, it does require the "victim" app to play nicely. You could try replacing the GetDesktopWindow call in my code with hWndFromOtherApp, and use GetClientRect (hWndFromOtherApp), but I'm not sure how nicely it will work.
Its worth a try though, as it won't take much effort to test!
Good luck,
Iain.
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I tried, the WM_PRINT approach generally fails because I cannot suppose other application to implement it. And using BringWindowToTop, it still have some problems:
(1) When a window is maximized, the rect from GetWindowRect is the one when not maximized.
(2) When something was set to be always on top, it will appear on the resulted images.
I wonder whether subclassing of a window can do it correctly.
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Im not sure its your answer or no but if its not your answer reply to me
HDC m_hdcMem,hdc;
HBITMAP m_Bitmap,m_OldBitmap,hMainBmp ;
hdc=GetDesktopWindow()->GetDC()->m_hDC;
m_hdcMem= CreateCompatibleDC(hdc);
m_Bitmap = CreateCompatibleBitmap(hdc,800,600);
m_OldBitmap=(HBITMAP) SelectObject(m_hdcMem, m_Bitmap);
BitBlt(m_hdcMem, 0,0,800,600, hdc,0,0,SRCCOPY);
hMainBmp =(HBITMAP) SelectObject(m_hdcMem, m_OldBitmap);
CImage m_Image;
m_Image.Attach(hMainBmp);
m_Image.Save("c:\\test.bmp");
m_Image.Detach();
DeleteDC(m_hdcMem);
DeleteObject(hMainBmp );
DeleteObject(m_OldBitmap);
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I want a snapshot for a specific application, which I only has its HWND, and I don't want the always-on-top things to appear in the resulted image, besides, the orginal orders of the windows should not be changed, this is pretty like the window mode of SnagIt, thanks
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Well you can use of hwnd on the GetDC that retrieves a handle to dc of current window did you try with it HDC hdc=::GetDC(hWnd);.
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hDC = ::GetDC (hWnd);
::ReleaseDC (hWnd, hDC);
Sometimes its simpler that you think!
You should also have a peek at WM_PRINT, as it asks the other window to draw itself nicely in a DC you provide.
Iain.
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