dialog id undeclared identified

i have created win32 application with MFC in a shared Dll.

i have include a dialog with ID = IDD_DIALOG.i have created class for dialog which is CSettingsDlg derived from CDialog.
and included header

Code:

---

      class CSettingsDlg : public CDialog
{
        DECLARE_DYNAMIC(CSettingsDlg)

public:
        CSettingsDlg(CWnd* pParent = NULL);  // standard constructor
        virtual ~CSettingsDlg();

// Dialog Data
        enum { IDD = IDD_DIALOG1 };// error C2065: 'IDD_DIALOG1' : undeclared identifier

protected:
        virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

        DECLARE_MESSAGE_MAP()
};

---

i am getting an error :
error C2065: 'IDD_DIALOG1' : undeclared identifier

what should i do ?

error C2065: 'IDD_DIALOG1' : undeclared identifier

a variable’s type must be specified in a declaration before it can be used. The parameters that a function uses must be specified in a declaration, or prototype, before the function can be used.

what should i do.i dint understand.

What kind of dll did you make ? To have dialogs in a MFC dll it needs to be a MFC extension dll instead of a regular dll.

Are you sure you are including "resource.h" where it is needed?

i didn't use any dll.

what i meant i took a "win32 application" and in project setting i took "MFC in a shared Dll" option since i am using MFC support thats all.

yes @Mike Harnad

did you include the resource.h file

Use the resource editor and make sure you actually have a resource with that ID.

i observed this :-

Code:

---

resource.h
                #define IDD_DIALOG1                    104

.cpp
// Dialog Data
        enum { IDD = 104 }; //when i include this its is working
        //enum { IDD = IDD_DIALOG1 };//when in include its not working

---

Take a look here.