Re: Use DLL for get Windows Message?

From:
"Ben Voigt" <rbv@nospam.nospam>
Newsgroups:
microsoft.public.vc.language
Date:
Fri, 30 Mar 2007 13:56:45 -0500
Message-ID:
<eAEw01vcHHA.4352@TK2MSFTNGP03.phx.gbl>

Usually you need a message dispatch
loop, your function steals all messages sent to any window in the thread

My application (another language without window gui) is running into
simple
windows. Correctly I have a window application but it's all I have from
window gui. I don't have menu and I don't have any common dialogs. So
common
dialogs are no problem, but menu!
You wrote: ...all messages sent to any window in the thread... but I
cannot
send any messages from DLL to my application or from my application to my
DLL
because I don't have the possibility to read this message into my
application. I have only possibility to use a DLL into my application.


Are you wanting the application to wait for the DLL to return a menu item,
like you would wait for scanf to return a line of text?

Usually event handlers are implemented using callbacks (push), but you can
certainly do pull as well.

int selection;
LRESULT CALLBACK WindowProc( HWND hwnd,
    UINT uMsg,
    WPARAM wParam,
    LPARAM lParam
){ if (uMsg == WM_COMMAND && lParam == NULL) selection =
LOWORD(wParam); return DefWindowProc(hwnd, uMsg, wParam, lParam);}int
GetMenuSelection()
{
BOOL bRet;selection = 0;

while( (bRet = GetMessage( &msg, hWnd, 0, 0 )) != 0)
{
    if (bRet == -1)
    {
        // handle the error and possibly exit
    }
    else
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg); if (selection > 0) return selection;
// Processed a menu selection
    }
} return -1; // User closed window}

Thanks

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