sendmessage and CDialog pointer

[nss]

I need to transmit the pointer of the CDialog to the parent > I am not able to set a member of the parent because it doesnt fit with my scheme. So can I do this? m_pParent->SendMessage(UDM_SOMETHING, this, ndummy) ? Thanks

[valikac]

One solution is GetParent(). Another solution is AfxGetMainWnd(). Kuphryn

[nss]

Cant do those. I am unable to include my view.h file into the cdialog.h file due to deeply entrenched circular includes... So is SendMessage a bad idea?

[Dave Bryant]

nss wrote: I am unable to include my view.h file into the cdialog.h file due to deeply entrenched circular includes... But you should be able to include it in the cpp file, and just forward declare the class in the header file. Anyway, SendMessage will work (although it is not really necessary here). You can do something like: GetParent()->SendMessage( dlgPointerMessage, reinterpret_cast( this ) ); And in the parent message map: ON_MESSAGE( dlgPointerMessage, OnDlgPointerMessage ) LRESULT OnDlgPointerMessage(WPARAM wParam, LPARAM lParam) {   CDlg* pDlg = reinterpret_cast<CDlg*>( wParam );   ASSERT_VALID( pDlg );   // Do something   return 0; } Dave http://www.cloudsofheaven.org

[nss]

Terrific! Many thanks. I also wonder if GetParent()->RunParentFunction() would work.....I will try it. Apprecite your help greatly! I didnt know about the reinterpret_cast....

[Dave Bryant]

It won't directly because GetParent() returns a CWnd pointer. But if you know exactly what type it is, you can cast it and then call your function. static_cast( GetParent() )->RunParentFunction(); Dave http://www.cloudsofheaven.org

[Dave Bryant]

Annoying html tags - i meant: static_cast<CParentClass*>( GetParent() )->RunParentFunction(); Dave http://www.cloudsofheaven.org

[ns]

IT works!! The only thing is that I think in your earliest post with the reinterpret_cast, the <> were missing so I guessed you meant: m_pParent->SendMessage(MSGE, ndummy, reinterporet_cast<UNIT>(this)); I did this by deducing it might be what you meant and its seems fine. Is this indeed what you intended I should do? Your post says interpret_cast (this) but it wouldnt compile that way--- not until I put in the type to cast to..... So is that okay or did you mean something else? Thanks! Appreciate your help, ns

[Dave Bryant]

I meant to put in the angle brackets, but i forgot that CodeProject interprets them as HTML, so they got gobbled up... Dave http://www.cloudsofheaven.org