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CDialogEx undefined class

I am creating MDI project with CFormView.
On Views Form dialog I placed a button.
And inserted one more dialog in project (IDD_DIALOG1)
Created One class(CDia) derived from CDialogEx which is using (IDD_DIALOG1) using "AddClass"
On Button click I written following code
CDia dia;
dia.DoModal();

And added appropriate header file "Dia.h"
On compiling it gives error CDialogEx undefined.
I am using Visual Studio 2010 Professional
Please help me to solve thia issue

jkr

Can you post the relevant code?

ADITYA RAO

ASKER

class CDia : public CDialogEx
{
	DECLARE_DYNAMIC(CDia)

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

// Dialog Data
	enum { IDD = IDD_DIALOG1 };

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

	DECLARE_MESSAGE_MAP()
};

void CMerilisaRView::OnBnClickedButton1()
{
	CDia cd;
	cd.DoModal();
	
}

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Error 1 error C2504: 'CDialogEx' : base class undefined e:\aditya
practice\merilisar\merilisar\dia.h 7 1 MerilisaRHandlers
Error 2 error C2039: 'DoModal' : is not a member of 'CDia'
e:\aditya practice\merilisar\merilisar\merilisarview.cpp 118 1
MerilisaRHandlers

ASKER CERTIFIED SOLUTION

sarabande

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