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Screen Capture , to Clipboard, C++ Source Code, Get bitmap of Window.

How do you capture the bitmap of a window? This little download shows how, and places the bitmap on the clipboard.

1

One of the common questions that I find on the microsoft. public forums is "How do I get a bitmap of a window on the screen?" Well, here's a little subroutine I used extensively in writing Win32 Programming, because I realized that for the number of illustrations I wanted for the book, there was no hope of doing screen captures and then hand-editing just the control I wanted to show. So all my Explorers have a little button somewhere that performs a screen capture of the example window and drops it into the clipboard. I could then paste it into the document, or paste it into an editor and save it as a TIFF or JPEG as well.

ToClip.h:

void toClipboard(CWnd * wnd, BOOL FullWnd);

ToClip.cpp

#include "stdafx.h"
#include "toclip.h" 
/****************************************************************
*                                 toClipboard
* Inputs:
*       CWnd * wnd: Window whose contents are to be sent 
*                   to the clipboard
*       BOOL FullWnd: TRUE for entire window, 
*                     FALSE for client area
* Result: void
*       
* Effect: 
*       Copies the contents of the client area or the window
*       to the clipboard in CF_BITMAP format.
*****************************************************************/

void toClipboard(CWnd * wnd, BOOL FullWnd)
    {
     CDC dc;
     if(FullWnd)
        { /* full window */
         HDC hdc = ::GetWindowDC(wnd->m_hWnd);
         dc.Attach(hdc);
        } /* full window */
     else
        { /* client area only */
         HDC hdc = ::GetDC(wnd->m_hWnd);
         dc.Attach(hdc);
        } /* client area only */

     CDC memDC;
     memDC.CreateCompatibleDC(&dc);

     CBitmap bm;
     CRect r;
     if(FullWnd)
        wnd->GetWindowRect(&r);
     else
         wnd->GetClientRect(&r);

     CString s;
     wnd->GetWindowText(s);
     CSize sz(r.Width(), r.Height());
     bm.CreateCompatibleBitmap(&dc, sz.cx, sz.cy);
     CBitmap * oldbm = memDC.SelectObject(&bm);
     memDC.BitBlt(0, 0, sz.cx, sz.cy, &dc, 0, 0, SRCCOPY);

     wnd->GetParent()->OpenClipboard();
     ::EmptyClipboard();
     ::SetClipboardData(CF_BITMAP, bm.m_hObject);
     CloseClipboard();

     memDC.SelectObject(oldbm);
     bm.Detach();  // make sure bitmap not deleted with CBitmap object
    }

News:

1 UCanCode Advance E-XD++ CAD Drawing and Printing Solution Source Code Solution for C/C++, .NET V2017 is released!

2 UCanCode Advance E-XD++ HMI & SCADA Source Code Solution for C/C++, .NET V2017 is released!

3 UCanCode Advance E-XD++ GIS SVG Drawing and Printing Solution Source Code Solution for C/C++, .NET V2017 is released!

 


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