Color Dialog with Persistent Custom Colors

The MFC CColorDialog class encapulates the standard Color common dialog box. This dialog allows you to select a standard color, pick from a list of custom colors, or expand the dialog to create a color.

However, although you can define a custom color, the MFC implmentation does not save your custom colors for later use.

The following class, derived from CColorDialog, lets you do just this.

// ColorDialog.h : header file
// (c) 1997 Roger Onslow

#ifndef _CMyColorDialog_
#define _CMyColorDialog_

// CMyColorDialog dialog

class AFX_EXT_CLASS CMyColorDialog : public CColorDialog {
     // Construction
     CMyColorDialog( COLORREF clrInit = 0, DWORD dwFlags = 0, CWnd*
pParentWnd = NULL );
     // Statics
     enum { NCUSTCOLORS = 16 };
     static COLORREF c_CustColors[NCUSTCOLORS];
     static COLORREF c_LastCustColors[NCUSTCOLORS];
     static bool c_NeedToInitCustColors;
     static void InitCustColors();
     static void SaveCustColors();
     // Dialog Data
     // Overrides
     // ClassWizard generate virtual function overrides
     virtual int DoModal();
     virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
     // Implementation
     // Generated message map functions


// ColorDialog.cpp - auto load/save of custom colors CColorDialog extension
// (c) 1997 Roger Onslow

#include "stdafx.h"
#include "ColorDialog.h"

#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;

// CMyColorDialog property page


bool CMyColorDialog::c_NeedToInitCustColors = true;
COLORREF CMyColorDialog::c_CustColors[];
COLORREF CMyColorDialog::c_LastCustColors[];

#define SECTION _T("Custom Colors")

void CMyColorDialog::InitCustColors() {
     for (int i = 0; i < NCUSTCOLORS; i++) {
          CString entry; entry.Format("%d",i);
          c_LastCustColors[i] = c_CustColors[i] =
     c_NeedToInitCustColors= false;

void CMyColorDialog::SaveCustColors() {
     for (int i = 0; i < NCUSTCOLORS; i++) {
          if (c_LastCustColors[i] != c_CustColors[i]) {
               CString entry; entry.Format("%d",i);
               if (c_CustColors[i] == RGB(255,255,255)) {
               } else {
                    ::AfxGetApp()->WriteProfileInt(SECTION, entry,c_CustColors[i]);
               c_LastCustColors[i] = c_CustColors[i];

CMyColorDialog::CMyColorDialog( COLORREF clrInit, DWORD dwFlags, 
		CWnd* pParentWnd) : CColorDialog(clrInit,dwFlags,pParentWnd)
     if (c_NeedToInitCustColors) {
     m_cc.lpCustColors = c_CustColors;

int CMyColorDialog::DoModal() {
     int code = CColorDialog::DoModal();
     return code;

void CMyColorDialog::DoDataExchange(CDataExchange* pDX) {
     // overridden (calls this base class)

BEGIN_MESSAGE_MAP(CMyColorDialog, CColorDialog)


  • Why not a demo project

    Posted by Legacy on 12/04/2003 12:00am

    Originally posted by: cey

    Why not creating a demo project? It takes much time to implement the codes.

  • need a project to resolve implementation problems

    Posted by Legacy on 07/20/1999 12:00am

    Originally posted by: Greg Franz

    I have run into a number of problems trying to implement this into a project. Is there any way that you could provide an implementation project.

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