Re: PostMessage() to a Regular DLL

From:

Ajay Kalra <ajaykalra@yahoo.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Thu, 8 Jan 2009 12:49:30 -0800 (PST)

Message-ID:

<50bc21de-63fb-4cd9-8ce2-3ff1d25e32dd@d42g2000prb.googlegroups.com>

On a related note, why are you using a Regular DLL?

--
Ajay

On Jan 8, 1:12 pm, Stephen Myers
<StephenMy...@discussions.microsoft.com> wrote:

"Ajay Kalra" wrote:

On Jan 8, 11:24 am, Stephen Myers
<StephenMy...@discussions.microsoft.com> wrote:

But something like

theApp.PostThreadMessage(...) // where theApp is the Dll's CWinApp

should fail since there's no thread associated with theApp.

That should work as well because theApp is derived from CWinThread and
should accept this message. Why do you say that there is no thread
associated with theApp?

--
Ajay

This is exactly what I was hoping would work. Unfortunately, my test
indicated that the PostThreadMessage() gets handled by the EXE's CWinApp,=

not

by the DLL's

BEGIN_MESSAGE_MAP(MyDLLApp, CClWinApp)
        ON_THREAD_MESSAGE(MyMsg,OnTestMessage)
END_MESSAGE_MAP()

UINT MyThread( LPVOID pParam )
{
        AFX_MANAGE_STATE(AfxGetStaticModuleState());
        theApp.PostThreadMessage(MyMsg ,0,0);
        return 0;

}

void MyDLLApp::GenerateCTask(int argc, char *argv[], char *envp[])
{
        AFX_MANAGE_STATE(AfxGetStaticModuleState());
        AfxBeginThread(MyThread,NULL);

}

void MyDllApp::OnTestMessage(WPARAM,LPARAM)
{
        TRACE("In %s\n",__FUNCTION__);

}

The thread message gets handled by the MainApp's CWinApp message map disp=

ite

using theApp (I didn't include the code, but it is much the same as shown
here for MyDLLApp).

This is what was pointed out by Joe et al. MyDLLApp is not really a th=

read

even though it's derived from CWinThread.

Steve