The document describes code for a Colors app that allows setting text and background colors. It declares color variables in CColors.h and initializes them in CColors.cpp. ColorsDlg includes CColors and declares its own color variables, initializing them in its OnInitDialog method. Buttons in ColorsDlg launch color pickers and update the relevant color variables when selected, redrawing the window.

1. Colors App

15. • Declare 3 variables in CColors.h
………………………………..
public:
COLORREF m_clrText;
COLORREF m_clrBkgnd;
CBrush m_brBkgnd;
};

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

19. CColors.cpp
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;
}

22. • Add 2 variables in ColorsDlg.h to get the values
from the var of CColors: m_clrText, m_clrBkgnd.
ColorsDlg.h
#include "CColors.h“
…………………………………..
public:
CColors m_edit;
COLORREF m_culText;
COLORREF m_culBkgnd;
};

23. • Initialize the variables in CColorsDlg::OnInitDialog() of
ColorsDlg.cpp:
……………………………………….
// TODO: Add extra initialization here
m_culText = RGB(0, 0, 0);
m_culBkgnd = RGB(255, 255, 255);
return TRUE; // return TRUE unless you set the
focus to a control
}

28. void CColorsDlg::OnClickedButton1()
{
// TODO: Add your control notification handler code here
CColorDialog dlg;
dlg.DoModal();
m_culText = dlg.GetColor();
m_edit.m_clrText = m_culText;
RedrawWindow();
}

33. void CColorsDlg::OnClickedButton2()
{
// TODO: Add your control notification handler code here
CColorDialog dlg;
dlg.DoModal();
m_culBkgnd = dlg.GetColor();
m_edit.m_clrBkgnd = m_culBkgnd;
RedrawWindow();
}