The document describes adding a CColors class to manage text and background colors. It defines COLORREF variables for the text and background colors and a CBrush for the background. The constructor initializes the colors. The CtlColor method sets the text and background colors on the DC and returns the background brush. Click handlers for two checkboxes update the text or background color and redraw the window.

1. Check

11. Add class CColors to manage the colors:

15. Declare 2 variables in CColors.h to manage the colors:
…………………….
public:
COLORREF m_clrText;
COLORREF m_clrBkgnd;
CBrush m_brBkgnd;

16. Initiatize the var in the constructor of the CColors.cpp
CColors::CColors()
{
m_clrText = RGB(0, 0, 0);
m_clrBkgnd = RGB(255, 255, 255);
m_brBkgnd.CreateSolidBrush(m_clrBkgnd);
}

20. HBRUSH CColors::CtlColor(CDC* pDC, UINT nCtlColor)
{
// TODO: Change any attributes of the DC here
pDC->SetTextColor(m_clrText);
pDC->SetBkColor(m_clrBkgnd);
// TODO: Return a non-NULL brush if the parent's handler
should not be called
return m_brBkgnd;
//return NULL;
}

27. void CCheckDlg::OnClickedCheck1()
{
// TODO: Add your control notification handler code here
if (IsDlgButtonChecked(IDC_CHECK1))
m_edit.m_clrText = RGB(255, 0, 0);
else
m_edit.m_clrText = RGB(0, 0, 0);
RedrawWindow();
}

32. void CCheckDlg::OnClickedCheck2()
{
// TODO: Add your control notification handler code here
if (IsDlgButtonChecked(IDC_CHECK2))
m_edit.m_clrBkgnd = RGB(0, 255, 0);
else
m_edit.m_clrBkgnd = RGB(255, 255, 255);
RedrawWindow();
}

33. In CheckDlg.h
#include "CColors.h"