How do you identify a key events source (std keyboard or a USB barcode reader emulating keyboard)?

I have attached a USB barcode reader which essentially emulates a USB
keyboard. Having looked through the VC++ V5.0 documentation and some SDK
documents that I have, I could not find a library function that identifies
what device sourced the keyboad event.
Does know if this is possible ? Anyone have any ideas ?
Thanks.

If you over ride the "CWnd:reTranslateMessage" function you'll be able to trap keyboard messages.
ex:
BOOL CTestexecDlg:reTranslateMessage(MSG* pMsg)
if (pMsg->message == WM_KEYDOWN && (pMsg->wParam == 13 || pMsg->wParam == VK_ESCAPE))
// Enter or escape key was pressed; return TRUE to stop default handling
return TRUE;
if (pMsg->message == WM_KEYDOWN && pMsg->wParam == 0x30)
BringWindowToTop( );
return TRUE;
if (pMsg->message == WM_KEYDOWN && pMsg->wParam == 0x31 && m_DisplayObject1 != NULL)
// Enter or escape key was pressed; return TRUE to stop default handling
m_DisplayObject1->SetWindowToTop( );
return TRUE;
if (pMsg->message == WM_KEYDOWN && pMsg->wPa
ram == 0x32 && m_DisplayObject2 != NULL)
// Enter or escape key was pressed; return TRUE to stop default handling
m_DisplayObject2->SetWindowToTop( );
return TRUE;
if (pMsg->message == WM_KEYDOWN && pMsg->wParam == 0x33 && m_DisplayObject2 != NULL)
// Enter or escape key was pressed; return TRUE to stop default handling
m_DisplayObject3->SetWindowToTop( );
return TRUE;
return CDialog:reTranslateMessage(pMsg);
Steve

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hello,
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j

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domdp wrote:
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Jamiesroom wrote:
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Here's a couple related threads
http://forum.java.sun.com/thread.jspa?forumID=57&threadID=583877
http://forum.java.sun.com/thread.jspa?forumID=57&threadID=712386
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hi
have a lool at tables rsreqdone and rsbkrequest with a join you should be able to determine the source.
regards
Boujema
How to give points: Mark your thread as a question while creating it. In the answers you get, you can assign the points by clicking on the stars to the left. You also get a point yourself for rewarding (one per thread).
Edited by: Boujema Bouhazama on May 9, 2008 12:04 AM

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1. There is no right answer. There is no "should". There is the way that makes sense to you.
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This might give you some ideas:
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Who
What
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HI,
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Hi
A job which would complete successfully in SAP via the SM36 scheduler completes with an 'Error' in Redwood CPS because there are errors within the spool and it ends with a return code 4.
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Hi Anton
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How do you identify a key events source (std keyboard or a USB barcode reader emulating keyboard)?

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