1st You download Webcam Driver.
installed my webcam After this install the Webcam driver in the system.
Installation of Webcam Driver
Go to the control panel
Click on the System Icon
Click on the Hardware Tab
Click on the Device Manager s
Select the Unknown Device or printer device where yellow Question Marks sign on it.
Right click on it and uninstall it.
After this go to the top of the device manager and click on scan for hardware changes.
Driver installation Wizard start.
Brows Your Driver from the Hard Disk and click on next.
Driver will be install.

It can, providing its compatible with the chat program of your choice and it needs to be configured to that chat program.
example - Windows Live Messenger (msn)
Vista - If you have an earlier OS, you may have to access your hardware from the Control Panel.

TEST SPEAKERS
Right click on speaker icon in System Tray or from Control Panel
Select "Playback Devices"
The speaker icon ( checked as working) and volume level graph should be visible
Right click on the volume graph and click "Test"
Left hand speakers followed by right hand should be heard

SET DEFAULT & TEST MIC
Click "Recording" tab.
To set required (webcam) mic as default - click on mic font to highlight and click "Properties"
In lower dropbox display "Use this device enable" click 'OK'
Click "Levels" tab and ramp up sliders ( adjust to suit later)
Return to "Recording". Test mic by speaking and make sure volume graph displays

Restart computer

CONFIGURE TO MESSENGER
Test your webcam here to make sure it broadcasts ok - Hit 'Allow' in the top window and check your cam in the left hand panel.

http://www.testmycam.com/

If it fails to work here concentrate on your webcam drivers and software before moving forward.

Set your webcam mic (if it has one as default)
Vista -

Having proved your cam is working ,you can configure it to WLM (MSN)

CONFIGURE SOFTWARE to MSN
Its good practice to disconnect and re-connect your webcam before you start - if you have been using it elsewhere the MSN software may have difficulty in locating it, even if you exited the previous program correctly.
The reason being, the webcam software can remain hooked-up to a program and needs to be rebooted.
Mine, I just unplug it from the USB and plug it back in to reboot the software.
If yours is integral with the computer you will have to re-start the computer, use a keyboard shortcut or disable / enable the webcam from the Device Manager.

Open MSN
Click 'Open Menu'
From 'Tools; navigate to, and click, 'Audio and Video setup'
Set your speakers
Click 'Test' - if OK, move on.
Set your mic as default
Use the slider to set volume and test.
Click 'Next'
This takes you to the video setup
Your webcam should be broadcasting - (if not - make sure the webcam is set as default - restart MSN)
Use 'Webcam Settings'to fine tune the picture.
Click 'Finish'