Lightbox components are a standard part of the Salesforce UI, but they’re not easily available (until now!) for your own code.

Salesforce lightboxes have the following properties:

• They “grey out” the rest of the page behind the component, making the page unclickable until the lightbox is dismissed
• They can be dragged around the screen by dragging on the title bar
• They can contain any content you like, including a Visualforce page (use an iframe inside the lightbox)

Get Salesforce Lighbox component @ http://sites.force.com/appexchange/listingDetail?listingId=a0N30000001g3u0EAA#

Salesforce.com has an IP address block allocated directly to salesforce.com by the American Registry for Internet Numbers (ARIN).

To provide continuity of service if you utilize email or IP address security filters, white list or otherwise add salesforce.com’s IP address space to your list of trusted addresses

The IP address spaces are as follows:

204.14.232.0/25 East Coast Data Center (set one)
204.14.233.0/25 East Coast Data Center (set two)
204.14.234.0/25 West Coast Data Center (set one)
204.14.235.0/25 West Coast Data Center (set two)
202.129.242.0/25 Singapore Data Center

To clarify, the “0/25” that you see in the ranges refers to an abbreviated form of Classless Inter-domain routing notation. In essence this notation is a network number followed by a “/” and a number , the latter number indicates the number of 1’s (starting a the left most bit i.e MSB – most significant bit) in the subnet mask i.e the number of bits relevant to a network portion of the IP address. So “/25” means 25 bits constitute the subnet mask of 255.255.255.128, and really 25 bits reserved for network address which is identified by performing bitwise “AND” to the full network number.

For example 204.14.232.0/25 means 2 possible networks in the form of 204.14.232.0 and 204.14.232.128 each having possible 126 hosts i.e total 252 hosts or IP addresses per specified range.

Salesforce CRM provides two tools for data migration—the Import Wizard and the Apex Data Loader.

The Import Wizard

is designed for less-technical users and smaller, simple imports of up to 50,000 records. It takes you through the process step by step and displays error messages to alert you to potential record duplications (“dupes”). For more information, go to Help & Training | Importing Data | Using the Import Wizards.

Use the Apex Data Loader

for complex imports of any size. It’s for technical users only. You’ll need access to the API to use this tool, which is included with Enterprise and Unlimited Edition. If you have another edition, you can purchase the API separately by contacting your account executive. The Data Loader doesn’t display error messages to alert you to potential problems. However, this tool includes several features that help make large data imports easier, such as being able to save your mappings. For more information, go to Help & Training | Data Loader.

The table below summarizes the difference between the two tools. The instructions in the remaining steps refer to the Import Wizard.

1. Page Break
While generating PDF template from Visualforce, if you want to give the page break ,below code snippet is very useful.
You can use the page break style properties to control where the browser will insert a page break. The Force.com PDF content converter will carry that over to the PDF.

<apex:page renderas="pdf">
<div style="page-break-after:always;">
This is page one
</div>
</apex:page>

2. Page layout and Page number
The following snippet shows you have to switch the PDF page layout to landscape and add page numbers to your Visualforce page. Use the below code in CSS of Visualforce page.

@page {
/* Landscape orientation */
size:landscape;
/* Put page numbers in the top right corner of each page in the pdf document. */
@top-right
{
content: “Page ” counter(page);
}
}

Source : Kyle Roche / Pragya Kumari