Creating CWnd derived control at runtime - c++

Question

I am trying to create CWnd derived class at runtime but CWnd::Create fails. I have no idea why. Here is minimal code that show the problem:
MFCTestApplicationDlg.h
#pragma once
class c_CustomButton : public CButton
{
protected:
DECLARE_MESSAGE_MAP()
virtual void PreSubclassWindow();
public:
c_CustomButton();
virtual ~c_CustomButton();
};
class TestWindow : public CWnd
{
public:
TestWindow();
virtual ~TestWindow();
protected:
DECLARE_MESSAGE_MAP()
DECLARE_DYNCREATE(TestWindow)
};
// CMFCTestApplicationDlg dialog
class CMFCTestApplicationDlg : public CDialogEx
{
...
}
MFCTestApplicationDlg.cpp
//
#include "stdafx.h"
#include "MFCTestApplication.h"
#include "MFCTestApplicationDlg.h"
#include "afxdialogex.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
/*==========================================================================*/
c_CustomButton::c_CustomButton()
{
}
/*==========================================================================*/
c_CustomButton::~c_CustomButton()
{
}
BEGIN_MESSAGE_MAP(c_CustomButton, CButton)
END_MESSAGE_MAP()
/*==========================================================================*/
void c_CustomButton::PreSubclassWindow()
{
CButton::PreSubclassWindow();
ModifyStyle(0, BS_OWNERDRAW);
}
IMPLEMENT_DYNAMIC(TestWindow, CWnd)
TestWindow::TestWindow()
{
}
TestWindow::~TestWindow()
{
}
BEGIN_MESSAGE_MAP(TestWindow, CWnd)
END_MESSAGE_MAP()
void CMFCTestApplicationDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
c_CustomButton* pColoredButton = new c_CustomButton;
pColoredButton->Create((LPCTSTR)"", 0, CRect(), this, 0);// successeded
pColoredButton->SetWindowTextW((LPCTSTR)"test");
TestWindow* pTestWindow = new TestWindow;
pTestWindow->Create((LPCTSTR)"TestWindow", (LPCTSTR)"TestWindowName", 0, CRect(), this, 0);// failed
pTestWindow->SetWindowText((LPCTSTR)"test");
}
In void CMFCTestApplicationDlg::DoDataExchange(CDataExchange* pDX) I tried to create a CButton derived class object and CWnd derived class object. The first one created successfully but CWnd derived class object fails to create. Whats wrong with this code?