# helpdlg

Creates a help dialog box.

## Syntax

* h = helpdlg()
* h = helpdlg(text\_help)
* h = helpdlg(text\_help, title)
* h = helpdlg(text\_help, title, 'on')

## Input argument

* text\_help - a string or a cell of string: the help message.
* title - a string: the title of the dialog box.

## Output argument

* h - a QObject handle.

## Description

**errordlg** creates an help dialog box.

**h = helpdlg(text\_help, title, 'on')** specifies whether to replace an existing dialog box having the same name.

## Examples

```matlab
h = helpdlg()
```

```matlab
h = helpdlg('help string')
```

```matlab
h = helpdlg('help string', 'dialog title')
```

```matlab
h = helpdlg('help string', 'dialog title')
h = helpdlg('help string', 'dialog title', 'on')
```

## See also

[warndlg](warndlg), [errordlg](errordlg), [questdlg](questdlg), [msgbox](msgbox).

## History

| Version | Description     |
| ------- | --------------- |
| 1.0.0   | initial version |

## Author

Allan CORNET
