A litttle MFC push...

main.cpp

Code:

#include <afxwin.h>
#include "main.h"

CApp app;

BOOL CApp::InitInstance() {
	m_pMainWnd = new CMarco();
	m_pMainWnd->ShowWindow(m_nCmdShow);
	m_pMainWnd->UpdateWindow();
	return TRUE;
}

BEGIN_MESSAGE_MAP(CMarco, CFrameWnd)
	ON_WM_CREATE()
	ON_WM_PAINT()
	ON_BN_CLICKED(10000, OnBnClicked1)
	ON_BN_CLICKED(20000, OnBnClicked2)
END_MESSAGE_MAP()

CMarco::CMarco() {
	Create(NULL, "Hola");
}

CMarco::~CMarco() {
	delete m_btn2;
	delete m_btn3;
}

void CMarco::OnCreate(LPCREATESTRUCT lpCreateStruct) {
	m_btn2 = new CButton();
	m_btn2->Create("Hola", WS_CHILD|WS_VISIBLE, CRect(10, 10, 50, 40), this, 10000);

	m_btn3 = new CButton();
	m_btn2->Create("Boo", WS_CHILD|WS_VISIBLE, CRect(10, 60, 50, 40), this, 20000);
}

void CMarco::OnBnClicked1() {
	MessageBox("Estás presionado", "Hola");
}

void CMarco::OnBnClicked2() {
	m_btn2->EnableWindow(FALSE);
}


void CMarco::OnPaint() {
	CPaintDC dc(this);

	dc.TextOut(5, 5, "Joel");
} // :~ Al terminar CPaintDC es eliminada, Qué bien!

main.h

Code:

#if !defined(_MFC_MAIN_H_)
#define _MFC_MAIN_H_

class CApp : public CWinApp {
public:
	virtual BOOL InitInstance();
};

class CMarco : public CFrameWnd {
public:
	CMarco();
	~CMarco();
private:
	CButton* m_btn2;
	CButton* m_btn3;
protected:
	afx_msg void OnPaint();
	afx_msg void OnBnClicked1();
	afx_msg void OnBnClicked2();
	afx_msg void OnCreate(LPCREATESTRUCT lpCreateStruct);
	DECLARE_MESSAGE_MAP();
};

#endif

Why the buttons are not showed?

Looks fine to me.

Have you tried making the buttons normal members instead of allocating them on the heap? Should make no difference, but ...

Hmm, how about button styles?