In the namespace Microsoft.Phone.Task there are a number of external tasks that your Win7 Mobile application can launch, perform an action, and take the results back to your application.

These tasks include:

• PhoneCallTask- Making phone calls
• PhoneNumberChooserTask – Used to obtain a phone number from a contact.
• CameraCaptureTask– Used to allow users to take and return a new photo to their app.
• PhotoChooserTask– Used to allow users to select and return a photo to the application.
• EmailAddressChooserTask – Used to obtain the email address of a contact selected.
• EmailComposeTask– Used to send an email to a specified recipient.
• MarketplaceDetailTask – Launches the marketplace showing the details of the application.
• MarketplaceHubTask – Launches the windows phone marketplace client.
• MarketplaceReviewTask– Displays the review page on the marketplace for the application
• MarketplaceSearchTask– Shows the search results on the marketplace from given terms.
• SaveEmailAddressTask– Save an email address to a new or existing contact.
• SavePhoneNumberTask– Save a phone number to a new or existing contact.
• SearchTask– Launch a web search from given terms.
• SmsComposeTask– Launches the messaging application with a new SMS message displayed.
• WebBrowserTask– Launches the web site with a given URL.
• MediaPlayerLauncher – Launches the media player

For example, to have your Win7 Mobile application make a phone call you can do this by simply creating what is called the PhoneCallTask. The following example demonstrates how easy this is to do from a button click event:

private void PhoneBtn_Click(object sender, RoutedEventArgs e)

{

    try

    {

        PhoneCallTask task = new PhoneCallTask();

        task.PhoneNumber = “555-1212”;

        task.Show();

    }

    catch (Exception ex)

    {

        MessageBox.Show(ex.Message);

    }

}

Sending email is done in a similar way through the object called EmailComposeTask.

private void EmailBtn_Click(object sender, RoutedEventArgs e)

{

    EmailComposeTask ect = new EmailComposeTask();

    ect.To = "youremail@hotmail.com";

    ect.Subject = "Hello world";

    ect.Show();

}

Thanks,

–Mike