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From: David Ching on 1 Jul 2007 16:32
"Joseph M. Newcomer" <newcomer(a)flounder.com> wrote in message
news:1h3g835dotcvenq0pkun2qtbq1uvdlf87p(a)4ax.com...
> Thanks, David, I couldn't remember that it was you who had done this. I'd
> posted a
> response that said it existed.

I saw that, and thanks for the reference. BTW, it doesn't involve DLL
injection though, which makes it very convenient to call without the trouble
of creating a special DLL.

-- David


From: Joseph M. Newcomer on 1 Jul 2007 17:14
I'd misremembered the thread, then. I've got to download your code...but it sounds like
it is truly doing handstands to get everything to work right. I may have confused it with
a solution I did see that used DLL injection.
joe

On Sun, 01 Jul 2007 20:32:58 GMT, "David Ching" <dc(a)remove-this.dcsoft.com> wrote:

>"Joseph M. Newcomer" <newcomer(a)flounder.com> wrote in message
>news:1h3g835dotcvenq0pkun2qtbq1uvdlf87p(a)4ax.com...
>> Thanks, David, I couldn't remember that it was you who had done this. I'd
>> posted a
>> response that said it existed.
>
>I saw that, and thanks for the reference. BTW, it doesn't involve DLL
>injection though, which makes it very convenient to call without the trouble
>of creating a special DLL.
>
>-- David
>
Joseph M. Newcomer [MVP]
email: newcomer(a)flounder.com
Web: http://www.flounder.com
MVP Tips: http://www.flounder.com/mvp_tips.htm
From: Headache on 2 Jul 2007 04:31
I thought Windows might marshall the simple types too. I guess I've
been working too long with COM. However, I tried this in a single
process and still couldn't get it to work. This time I see the message
in Spy++. Looking at the MFC source code it seems to frig WM_NOTIFY
messages. Anyhow here is my source. I send the message in another
thread (as I guess my handler is on the main thread which is blocked
waiting on a SendMessage) and I'm new'ing the structure on the heap
and not even deleting it. I don't get into the MainFrame OnClick
handler even though it is in the message map. It makes me think I'm
missing something simple. Don't ask about where I break out the code
in OnCmdMsg - it was code I wrote while looking at the framework. Once
I get this going I'll have a look at the SendMessageRemote suggestion.

// MainFrm.cpp : implementation of the CMainFrame class
//

#include "stdafx.h"
#include "WmNotify.h"

#include "MainFrm.h"
#include ".\mainfrm.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CMainFrame

IMPLEMENT_DYNCREATE(CMainFrame, CFrameWnd)

BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
ON_WM_CREATE()
ON_NOTIFY(NM_CLICK, 0, OnClick)
ON_COMMAND(ID_EDIT_SENDMESSAGE, OnSendMessage)
END_MESSAGE_MAP()

static UINT indicators[] =
{
ID_SEPARATOR, // status line indicator
ID_INDICATOR_CAPS,
ID_INDICATOR_NUM,
ID_INDICATOR_SCRL,
};



UINT __cdecl SendMessageToMainWnd(LPVOID pParam)
{
NMITEMACTIVATE *pNMIA = new NMITEMACTIVATE;
::ZeroMemory(pNMIA, sizeof(NMITEMACTIVATE));
// Set up header
pNMIA->hdr.code = NM_CLICK;
pNMIA->hdr.hwndFrom = ::AfxGetMainWnd()->GetSafeHwnd();
pNMIA->hdr.idFrom = 426;
// Setup item and subitem
pNMIA->iItem = 1;
pNMIA->iSubItem = 2;

//DWORD dwThreadID = (DWORD)pParam;
::AfxGetMainWnd()->SendMessage(WM_NOTIFY, pNMIA->hdr.idFrom,
(LPARAM)pNMIA);

return 0;
}

// CMainFrame construction/destruction

CMainFrame::CMainFrame()
{
// TODO: add member initialization code here
}

CMainFrame::~CMainFrame()
{
}



int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
return -1;

if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE
| CBRS_TOP
| CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) ||
!m_wndToolBar.LoadToolBar(IDR_MAINFRAME))
{
TRACE0("Failed to create toolbar\n");
return -1; // fail to create
}

if (!m_wndStatusBar.Create(this) ||
!m_wndStatusBar.SetIndicators(indicators,
sizeof(indicators)/sizeof(UINT)))
{
TRACE0("Failed to create status bar\n");
return -1; // fail to create
}
// TODO: Delete these three lines if you don't want the toolbar to be
dockable
m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);
EnableDocking(CBRS_ALIGN_ANY);
DockControlBar(&m_wndToolBar);

return 0;
}

BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
if( !CFrameWnd::PreCreateWindow(cs) )
return FALSE;
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs

return TRUE;
}


// CMainFrame diagnostics

#ifdef _DEBUG
void CMainFrame::AssertValid() const
{
CFrameWnd::AssertValid();
}

void CMainFrame::Dump(CDumpContext& dc) const
{
CFrameWnd::Dump(dc);
}

#endif //_DEBUG


// CMainFrame message handlers
void CMainFrame::OnClick(NMHDR *pNMHDR, LRESULT* pResult)
{
::AfxMessageBox(_T("Hurrah!!"));
ASSERT(NM_CLICK == pNMHDR->code);

NMITEMACTIVATE *pNMIA = (NMITEMACTIVATE *)pNMHDR;

*pResult = 1;
}


void CMainFrame::OnSendMessage()
{
::AfxBeginThread(SendMessageToMainWnd, (LPVOID)::AfxGetApp()-
>m_nThreadID);
}

BOOL CMainFrame::OnCmdMsg(UINT nID, int nCode, void* pExtra,
AFX_CMDHANDLERINFO* pHandlerInfo)
{
// TODO: Add your specialized code here and/or call the base class
if ( (HIWORD(nCode) == WM_NOTIFY) && (LOWORD(nCode) == NM_CLICK) )
{
CString str;
str.Format(_T("Msg = %d, nCode = %d\n"), HIWORD(nCode),
LOWORD(nCode));
TRACE(str);
}
return CFrameWnd::OnCmdMsg(nID, nCode, pExtra, pHandlerInfo);
}

From: Headache on 2 Jul 2007 08:40
And I've made the id in the message map entry 426 not 0 ...

From: Scott McPhillips [MVP] on 2 Jul 2007 08:51
Headache wrote:
> I thought Windows might marshall the simple types too. I guess I've
> been working too long with COM. However, I tried this in a single
> process and still couldn't get it to work. This time I see the message
> in Spy++. Looking at the MFC source code it seems to frig WM_NOTIFY
> messages. Anyhow here is my source. I send the message in another
> thread (as I guess my handler is on the main thread which is blocked
> waiting on a SendMessage) and I'm new'ing the structure on the heap
> and not even deleting it. I don't get into the MainFrame OnClick
> handler even though it is in the message map. It makes me think I'm
> missing something simple.

I don't see anything wrong with your code, so I tried it out in a bare
new project and it worked for me.

--
Scott McPhillips [MVP VC++]

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