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Screen Capture to the Clipboard

, 5 Apr 2001 310.2K 90
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How do you capture the bitmap of a window? This little download shows how, and places the bitmap on the clipboard.

Introduction

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
    }

The views expressed in these essays are those of the author, and in no way represent, nor are they endorsed by, Microsoft.

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Copyright © 1999 All Rights Reserved
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About the Author

Joseph M. Newcomer

United States United States
No Biography provided

Comments and Discussions

 
GeneralTake a snapshot of a hidden window Pin
Member 368961631-Mar-08 4:39
memberMember 368961631-Mar-08 4:39 
GeneralRe: Take a snapshot of a hidden window Pin
Joseph M. Newcomer31-Mar-08 5:02
memberJoseph M. Newcomer31-Mar-08 5:02 
GeneralRe: Take a snapshot of a hidden window Pin
Member 368961631-Mar-08 5:58
memberMember 368961631-Mar-08 5:58 
GeneralRe: Take a snapshot of a hidden window Pin
Joseph M. Newcomer31-Mar-08 8:53
memberJoseph M. Newcomer31-Mar-08 8:53 
GeneralRe: Take a snapshot of a hidden window Pin
Member 368961631-Mar-08 9:20
memberMember 368961631-Mar-08 9:20 
GeneralRe: Take a snapshot of a hidden window Pin
Joseph M. Newcomer31-Mar-08 13:43
memberJoseph M. Newcomer31-Mar-08 13:43 
GeneralCapture MineSweeper Window Pin
SwimmerDave20-Jun-06 8:32
memberSwimmerDave20-Jun-06 8:32 
GeneralRe: Capture MineSweeper Window Pin
vikrant kpr25-Jan-08 1:25
membervikrant kpr25-Jan-08 1:25 
GeneralOther bitmap formats Pin
NeWi13-Oct-05 8:14
memberNeWi13-Oct-05 8:14 
GeneralRe: Other bitmap formats Pin
NeWi13-Oct-05 8:35
memberNeWi13-Oct-05 8:35 
GeneralRe: Other bitmap formats Pin
Joseph M. Newcomer18-Oct-05 8:46
memberJoseph M. Newcomer18-Oct-05 8:46 
Generalwindows on top interfere Pin
bbrehm0430-Aug-05 17:10
memberbbrehm0430-Aug-05 17:10 
GeneralRe: windows on top interfere Pin
Joseph M. Newcomer5-Sep-05 17:07
memberJoseph M. Newcomer5-Sep-05 17:07 
GeneralRe: windows on top interfere Pin
bbrehm046-Sep-05 15:13
memberbbrehm046-Sep-05 15:13 
GeneralCapture in Win32 - code Pin
powerpop30-Jun-05 17:20
memberpowerpop30-Jun-05 17:20 
QuestionHow to send captured screen shot through a socket? Pin
bijut6-May-05 8:39
memberbijut6-May-05 8:39 
AnswerRe: How to send captured screen shot through a socket? Pin
James R. Twine6-May-05 9:18
memberJames R. Twine6-May-05 9:18 
AnswerRe: How to send captured screen shot through a socket? Pin
Joseph M. Newcomer6-May-05 12:31
memberJoseph M. Newcomer6-May-05 12:31 
AnswerRe: How to send captured screen shot through a socket? Pin
jags_vc8-May-05 23:52
memberjags_vc8-May-05 23:52 
Questionhow to get image in memory? Pin
jags_vc25-Feb-05 2:00
memberjags_vc25-Feb-05 2:00 
AnswerRe: how to get image in memory? Pin
Joseph M. Newcomer25-Feb-05 7:18
memberJoseph M. Newcomer25-Feb-05 7:18 
GeneralRe: how to get image in memory? Pin
jags_vc27-Feb-05 19:13
memberjags_vc27-Feb-05 19:13 
GeneralRe: how to get image in memory? Pin
Joseph M. Newcomer27-Feb-05 23:02
memberJoseph M. Newcomer27-Feb-05 23:02 
GeneralRe: how to get image in memory? Pin
jags_vc7-Mar-05 2:13
memberjags_vc7-Mar-05 2:13 
GeneralRe: how to get image in memory? Pin
Joseph M. Newcomer9-Mar-05 11:40
memberJoseph M. Newcomer9-Mar-05 11:40 
GeneralAbout mouse pointer Pin
Rodrigo Vaz4-Apr-04 18:09
memberRodrigo Vaz4-Apr-04 18:09 
GeneralRe: About mouse pointer Pin
Joseph M. Newcomer4-Apr-04 20:35
memberJoseph M. Newcomer4-Apr-04 20:35 
GeneralRe: About mouse pointer Pin
Rodrigo Vaz6-Apr-04 20:25
sussRodrigo Vaz6-Apr-04 20:25 
GeneralRe: About mouse pointer Pin
Joseph M. Newcomer6-Apr-04 22:12
memberJoseph M. Newcomer6-Apr-04 22:12 
GeneralRe: About mouse pointer Pin
Rodrigo Vaz7-Apr-04 19:29
memberRodrigo Vaz7-Apr-04 19:29 
GeneralRe: About mouse pointer Pin
Andyzyx4-Sep-04 18:24
memberAndyzyx4-Sep-04 18:24 
Hi,

Nice article !!

I was looking at approaches for finding the screen position [ x, y ] for the object in the clipboard. So, if there is an text object(say through selection from a notepad) that was copied to the clipboard, I would like to determine its absolute position w.r.t to the window screen[ global co-ordinates ].

Is this even possible ? Can you help me out with some approaches to attack this problem ?

Thanks.
Andy


GeneralRe: About mouse pointer Pin
Joseph M. Newcomer5-Sep-04 11:57
memberJoseph M. Newcomer5-Sep-04 11:57 
QuestionHow capture a DirectX or OpenGL window? Pin
peterbing22-Feb-04 22:17
memberpeterbing22-Feb-04 22:17 
AnswerRe: How capture a DirectX or OpenGL window? Pin
Joseph M. Newcomer22-Feb-04 23:13
memberJoseph M. Newcomer22-Feb-04 23:13 
GeneralRe: How capture a DirectX or OpenGL window? Pin
NeWi13-Oct-05 8:29
memberNeWi13-Oct-05 8:29 
Questionhow to save clipboard to file?? Pin
Anonymous1-Jan-04 21:41
sussAnonymous1-Jan-04 21:41 
AnswerRe: how to save clipboard to file?? Pin
Joseph M. Newcomer1-Jan-04 21:55
memberJoseph M. Newcomer1-Jan-04 21:55 
AnswerRe: how to save clipboard to file?? Pin
Anonymous14-Jan-04 9:08
sussAnonymous14-Jan-04 9:08 
GeneralRe: how to save clipboard to file?? Pin
Joseph M. Newcomer14-Jan-04 9:58
memberJoseph M. Newcomer14-Jan-04 9:58 
AnswerRe: how to save clipboard to file?? Pin
NeWi13-Oct-05 8:18
memberNeWi13-Oct-05 8:18 
QuestionHow to convert to non-mfc? Pin
Tommy2k9-Dec-03 12:22
memberTommy2k9-Dec-03 12:22 
AnswerRe: How to convert to non-mfc? Pin
NeWi13-Oct-05 8:25
memberNeWi13-Oct-05 8:25 
QuestionHow can i detect a global screen capture? Pin
Miguel Lopes27-Oct-03 14:38
memberMiguel Lopes27-Oct-03 14:38 
AnswerRe: How can i detect a global screen capture? Pin
Joseph M. Newcomer2-Nov-03 14:29
memberJoseph M. Newcomer2-Nov-03 14:29 
QuestionHow can I print it? Pin
Alex Evans30-Sep-03 15:32
memberAlex Evans30-Sep-03 15:32 
GeneralCapturing the whole window Pin
Arne Diegenbach25-Sep-03 12:35
sussArne Diegenbach25-Sep-03 12:35 
GeneralI rate 5 for this article! Pin
xxxyyyzzz12-Feb-03 11:17
memberxxxyyyzzz12-Feb-03 11:17 
Generalsomething that you don't need Pin
Anonymous10-Oct-02 4:44
sussAnonymous10-Oct-02 4:44 
GeneralRe: something that you don't need Pin
Joseph M. Newcomer10-Oct-02 16:23
memberJoseph M. Newcomer10-Oct-02 16:23 
Generalthere's a bug Pin
pangtao17-Jul-02 18:45
susspangtao17-Jul-02 18:45 

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