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Multi-line InputBox control - MC++

, 7 Jun 2002 CPOL
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A .NET port of my MFC CFrameWnd derived InputBox class, written using MC++


Normal single-line InputBox

Multi-line InputBox

Demo app

Using the class

Just add a reference to InputBox.dll in your project. The class is part of the namespace CodeProject.WinForms. So you might want to add using CodeProject.WinForms on top of your source files. Of course that is if you are using C#. For an MC++ app you need to put using namespace CodeProject.Winforms on top of your source files.

InputBox Constructor

InputBox(); - This creates a normal InputBox with a single Input Line
InputBox(bool); - Depending on the bool you pass, this overload will create a multi-line InputBox if you pass true and a single line InputBox if you pass false


InputBox m_ib = new InputBox();
InputBox m_multi_ib = new InputBox(true);

Show() - The key function

This has two overloads.

String* Show(String* prompt);

String* Show(String* prompt, String* title);

prompt - This is the prompt text that will appear in the InputBox. It's a Label control and thus it will word wrap.

title - This is the window title of the InputBox

Return Value

The String that was entered is returned, if the OK button was clicked. If the Cancel button was clicked an empty string is returned.

Sample Code

InputBox m_ib = new InputBox(true);
this.textBox2.Text = m_ib.Show("Enter your address please.",
    "Your address");

The class structure

// InputBox.h

#pragma once

using namespace System;
using namespace System::ComponentModel;
using namespace System::Drawing;
using namespace System::Windows::Forms;

namespace CodeProject
    namespace WinForms
        public __gc class InputBox
            Form* InputForm;
            TextBox* InputText;
            Label* PromptText;
            Button* BtnOk;
            Button* BtnCancel;
            bool m_multiline;

            void InitializeComponent();
            String* Show();
            void BtnOk_Click(Object* sender,
                EventArgs* e);
            void BtnCancel_Click(Object* sender,
                EventArgs* e);
            String* Show(String* prompt);
            String* Show(String* prompt, String* title);


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Nish Sivakumar

United States United States
Nish is a real nice guy who has been writing code since 1990 when he first got his hands on an 8088 with 640 KB RAM. Originally from sunny Trivandrum in India, he has been living in various places over the past few years and often thinks it’s time he settled down somewhere.
Nish has been a Microsoft Visual C++ MVP since October, 2002 - awfully nice of Microsoft, he thinks. He maintains an MVP tips and tricks web site - where you can find a consolidated list of his articles, writings and ideas on VC++, MFC, .NET and C++/CLI. Oh, and you might want to check out his blog on C++/CLI, MFC, .NET and a lot of other stuff -
Nish loves reading Science Fiction, P G Wodehouse and Agatha Christie, and also fancies himself to be a decent writer of sorts. He has authored a romantic comedy Summer Love and Some more Cricket as well as a programming book – Extending MFC applications with the .NET Framework.
Nish's latest book C++/CLI in Action published by Manning Publications is now available for purchase. You can read more about the book on his blog.
Despite his wife's attempts to get him into cooking, his best effort so far has been a badly done omelette. Some day, he hopes to be a good cook, and to cook a tasty dinner for his wife.

Comments and Discussions

GeneralGreat work, Nish PinmemberTom Archer7-Jul-03 16:54 
GeneralRe: Great work, Nish PineditorNishant S7-Jul-03 17:06 

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