Re: How to determine whether the ALT-key is pressed

From:
"Nobody" <Nobody@yahoo.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Thu, 9 Aug 2007 08:44:56 -0700
Message-ID:
<egWS$wp2HHA.5980@TK2MSFTNGP04.phx.gbl>
Hi,

I am not terribly sure why Alt key doesn't work in OnKeyDown(), but try =
PretranslateMessage.
It might be a dialog thing.

BOOL CMuasDlg::PreTranslateMessage(MSG* pMsg)
{
 if(pMsg->message == WM_KEYDOWN)
 {
  UINT nChar = (UINT)pMsg->wParam;
  UINT nRepCnt = (UINT)pMsg->lParam & 0xFF00;
  UINT nFlags = (UINT)pMsg->lParam >> 16;
  OnKeyDown(nChar, nRepCnt, nFlags);
  return TRUE;
 }
......
}
Check if the ALT key it is there before implementing all of the above

Also, you may want to check out WM_SYSKEYDOWN and WM_SYSCHAR
http://msdn2.microsoft.com/en-us/library/aa924492.aspx
http://msdn2.microsoft.com/en-us/library/aa922034.aspx

One of those should work.

HTH,
"Weichao Wang" <weichao_wang@hotmail.com> wrote in message =
news:D8D982D8-6217-4786-AC5D-334BCE9EC143@microsoft.com...

Dear all,
in the function
void CMausDlg::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
from nFlags one should be able to determine if the ALT key is pressed. =

I've

tried with many options without success. Could you please give me an =

example

on this? Many thanks in advance!
 
--
Weichao Wang

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