"error C2065: 'ON_WM_THEMECHANGED' : undeclared identifier" [closed]

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Closed 8 years ago.

I'm using VC6.How to solve the error?

error C2065: "error C2065: 'ON_WM_THEMECHANGED' : undeclared identifier"

Class Definition Code:

    #include "stdafx.h"
    #include "ConfigListCtrl.h"
    #include "CellCtrls\ListCtrlCellWnd.h"
    #include "CellCtrls\CellButton.h"
    #include "Windows.h"
    #include "Winuser.h"
    // CConfigListCtrl

    IMPLEMENT_DYNAMIC(CConfigListCtrl, CListCtrl)

    CConfigListCtrl::CConfigListCtrl() : m_bInit(FALSE), m_bCaretExists(FALSE), m_bTabbedIn(FALSE), m_bKeyUp(FALSE), m_bIsEnabled(TRUE)
    {
    }

    CConfigListCtrl::~CConfigListCtrl()
    {
        ForEachCellCtrl(&CConfigListCtrl::DeleteCellCtrl);
    }

    BEGIN_MESSAGE_MAP(CConfigListCtrl, CListCtrl)
...
        ON_WM_THEMECHANGED()
...
    END_MESSAGE_MAP()
    ...
    }

It seems that I have missed some header file or lib file, but what are they, how to solve it anyway?

Answer 1

Themes were first introduced with Windows XP, several years after VC6. You will need an updated Windows SDK with the appropriate win... .h files.