Dialog of DLL not found

Hello Everybody

I have created a DLL for an already existing project and have a problem when displaying its dialog. There are already DLLs with dialogs in the project, which work perfectly. So I tryed to do the same procedure, my dialog just doesn't display.

What I did:
1. I created MFC AppWizard (dll), the name is Scanner.dll
2. I added the following:
#ifdef DLLDIR_EX
   #define DLLDIR  __declspec(dllexport)
#else
   #define DLLDIR  __declspec(dllimport)
#endif
and set DLLDIR_EX in the preporcessor definitions

3. I commented out all the App-Stuff including the Message maps
4. I pressed "Insert"--->"Form" for a new Dialog
5. My class has to inherit from CMyDialog instead of from CDialog. CMyDialog works with all the other dialogs of the project.

My new dll Scanner.dll compiles and links fine, but when running my exe programm, the dialog of Scanner.dll is not shown. When I run it in the debugger, I find that the call
"HRSRC hResource = ::FindResource(hInst, m_lpszTemplateName, RT_DIALOG);"
is failing in DLGCORE.CPP. The Parameters are hInst=0x00001b58 (this is the number of the dialog in the rc-file) and m_lpszTemplateName=0x00400000 (I don't know what that is).

Can anybody help me display my dialog ?

Thank you so much !

Sonja

//Scanner.h:
//------------
#ifdef SCANNER_DLLDIR_EX
   #define SCANNER_DLLDIR  __declspec(dllexport)   // export DLL information
#else
   #define SCANNER_DLLDIR  __declspec(dllimport)   // import DLL information
#endif 
 
 
 
#pragma comment(lib, "Scanner.lib")
 
class SCANNER_DLLDIR CScannerApp
{
public:
	CScannerApp();
  static int RunThisScanDlg();
};
 
 
//Scanner.cpp:
//------------
int CScannerApp::RunThisScanDlg()
{
  CScanDialog ScanDialog;
  ScanDialog.DoModal(); //in here it fails but the programm continues to the next line !!!
  return 1;             
}
 
 
 
//ScanDialog.h
#include "resource.h"
#include "MyDialog.h"
 
class CScanDialog : public CMyDialog
{
// Construction
public:
	CScanDialog(CWnd* pParent = NULL);   // standard constructor
 
// Dialog Data
	//{{AFX_DATA(CScanDialog)
	enum { IDD = IDD_SCANDIALOG_DIALOG };
		// NOTE: the ClassWizard will add data members here
	//}}AFX_DATA
 
 
// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CScanDialog)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL
 
// Implementation
protected:
 
	// Generated message map functions
	//{{AFX_MSG(CScanDialog)
	afx_msg void OnScan();
	afx_msg void OnCancel();
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};
 
 
//ScanDialog.cpp
//--------------
 
#include "stdafx.h"
#include "Scanner.h"
#include "ScanDialog.h"
 
void CScanDialog::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CScanDialog)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}
 
 
BEGIN_MESSAGE_MAP(CScanDialog, CDialog)
	//{{AFX_MSG_MAP(CScanDialog)
	ON_BN_CLICKED(IDC_SCAN, OnScan)
	ON_BN_CLICKED(IDC_CANCEL, OnCancel)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
 
CScanDialog::CScanDialog(CWnd* pParent /*=NULL*/)
	: CMyDialog(CScanDialog::IDD, pParent)
{
	//{{AFX_DATA_INIT(CScanDialog)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
}
 
void CScanDialog::OnScan() 
{
	// TODO: Add your control notification handler code here
	
}
 
void CScanDialog::OnCancel() 
{
	// TODO: Add your control notification handler code here
	
}

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