Re: errors pointing to the message map

From:

"Scott McPhillips [MVP]" <org-dot-mvps-at-scottmcp>

Newsgroups:

microsoft.public.vc.language

Date:

Sat, 17 May 2008 09:13:09 -0400

Message-ID:

<#TFVE$BuIHA.1316@TK2MSFTNGP06.phx.gbl>

"Jack" <jl@knight.com> wrote in message
news:e7WnAzBuIHA.1328@TK2MSFTNGP03.phx.gbl...

1>c:\documents and settings\luckie.mechtrans\projects\sizecbar.cpp(55) :
error C2440: 'static_cast' : cannot convert from 'UINT (__thiscall
CSizingControlBar::* )(CPoint)' to 'LRESULT (__thiscall CWnd::* )(CPoint)'
1> Cast from base to derived requires dynamic_cast or static_cast

BEGIN_MESSAGE_MAP(CSizingControlBar, baseCSizingControlBar)
   //{{AFX_MSG_MAP(CSizingControlBar)
   ON_WM_CREATE()
   ON_WM_PAINT()
   ON_WM_NCPAINT()
   ON_WM_NCCALCSIZE()
   ON_WM_WINDOWPOSCHANGING()
   ON_WM_CAPTURECHANGED()
   ON_WM_SETTINGCHANGE()
   ON_WM_LBUTTONUP()
   ON_WM_MOUSEMOVE()
   ON_WM_NCLBUTTONDOWN()
   ON_WM_LBUTTONDOWN()
   ON_WM_LBUTTONDBLCLK()
   ON_WM_RBUTTONDOWN()
   ON_WM_NCMOUSEMOVE()
   ON_WM_NCHITTEST() <<<<<< C2440
   ON_WM_CLOSE()
   ON_WM_SIZE()
   //}}AFX_MSG_MAP
   ON_MESSAGE(WM_SETTEXT, OnSetText)
END_MESSAGE_MAP()

how do I fix this? Thanks
Jack

Your message handler function has the wrong prototype. It should return
LRESULT instead of UINT. They used to be equivalent, but with 64-bit source
compatibility and improved compiler checking of the prototypes your old code
has a roadblock to progress. If you're not familiar with the message map
stuff you might want to just delete the function and message map line, then
add them again using the wizard.

--
Scott McPhillips [VC++ MVP]