How to use <apex:toolbar>  in Visualforce Page?

<apex:toolbar> :
A stylized, horizontal toolbar that can contain any number of child components. By default, all child components are aligned to the left side of the toolbar. Use an 
 <apex:toolbarGroup> component to align one or more child components to the right.

This tag supports following attributes:

Attribute	Description
contentClass	The style class used to display each child component in the toolbar, used primarily to designate which CSS styles are applied when using an external CSS stylesheet.
contentStyle	The style used to display each child component in the toolbar, used primarily for adding inline CSS styles.
height	The height of the toolbar, expressed as a relative percentage of the total height of the screen (for example, height="5%") or as an absolute number of pixels (for example, height="10px"). If not specified, this value defaults to the height of the tallest component.
id	An identifier that allows the toolbar component to be referenced by other components in the page.
itemSeparator	The symbol used to separate toolbar components. Possible values include "none", "line", "square", "disc", and "grid". If not specified, this value defaults to "none".
onclick	The JavaScript invoked if the onclick event occurs that is, if the user clicks the toolbar.
ondblclick	The JavaScript invoked if the ondblclick event occurs that is, if the user clicks the toolbar twice.
onitemclick	The JavaScript invoked if the user clicks on a component in the toolbar that is not in a toolbarGroup component.
onitemdblclick	The JavaScript invoked if the user clicks twice on a component in the toolbar that is not in a toolbarGroup component.
onitemkeydown	The JavaScript invoked if the user presses a keyboard key on a component in the toolbar that is not in a toolbarGroup component.
onitemkeypress	The JavaScript invoked if the user presses or holds down a keyboard key on an item in the toolbar that is not in a toolbarGroup component.
onitemkeyup	The JavaScript invoked if the user releases a keyboard key on an item in the toolbar that is not in a toolbarGroup component.
onitemmousedown	The JavaScript invoked if the user clicks a mouse button on an item in the toolbar that is not in a toolbarGroup component.
onitemmousemove	The JavaScript invoked if the user moves the mouse pointer while focused on an item in the toolbar that is not in a toolbarGroup component.
onitemmouseout	The JavaScript invoked if the user moves the mouse pointer away from the an item in the toolbar that is not in a toolbarGroup component.
onitemmouseover	The JavaScript invoked if the user moves the mouse pointer over an item in the toolbar that is not in a toolbarGroup component.
onitemmouseup	The JavaScript invoked if the user releases a mouse button on an item in the toolbar that is not in a toolbarGroup component.
onkeydown	The JavaScript invoked if the onkeydown event occurs that is, if the user presses a keyboard key.
onkeypress	The JavaScript invoked if the onkeypress event occurs that is, if the user presses or holds down a keyboard key.
onkeyup	The JavaScript invoked if the onkeyup event occurs that is, if the user releases a keyboard key.
onmousedown	The JavaScript invoked if the onmousedown event occurs that is, if the user clicks a mouse button.
onmousemove	The JavaScript invoked if the onmousemove event occurs that is, if the user moves the mouse pointer.
onmouseout	The JavaScript invoked if the onmouseout event occurs that is, if the user moves the mouse pointer away from the toolbar.
onmouseover	he JavaScript invoked if the onmouseover event occurs that is, if the user moves the mouse pointer over the toolbar.
onmouseup	The JavaScript invoked if the onmouseup event occurs that is, if the user releases the mouse button.
rendered	A Boolean value that specifies whether the toolbar is rendered on the page. If not specified, this value defaults to true.
separatorClass	The style class used to display the toolbar component separator, used primarily to designate which CSS styles are applied when using an external CSS stylesheet. See also the itemSeparator attribute.
style	The style used to display the toolbar, used primarily for adding inline CSS styles.
styleClass	The style class used to display the toolbar, used primarily to designate which CSS styles are applied when using an external CSS stylesheet.
width	The width of the toolbar, expressed as a relative percentage of the total width of the screen (for example, width="5%") or as an absolute number of pixels (for example, width="10px"). If not specified, this value defaults to 100%.

Visualforce Example:

<apex:page id="thePage">

    <apex:toolbar id="theToolbar">

        <apex:outputText value="Sample Toolbar"/>

        <apex:toolbarGroup itemSeparator="line" id="toobarGroupLinks">

            <apex:outputLink value="http://www.salesforce.com">salesforce </apex:outputLink>

            <apex:outputLink value="http://developer.salesforce.com">apex developer network </apex:outputLink>

        </apex:toolbarGroup>

        

        <apex:toolbarGroup itemSeparator="line" location="right" id="toobarGroupForm">

           <apex:form id="theForm">

                <apex:inputText id="theInputText">Enter Text</apex:inputText>

                <apex:commandLink value="search" id="theCommandLink"/>

            </apex:form>

        </apex:toolbarGroup>

    </apex:toolbar>

</apex:page>