[MSDN Library April 2000] ISNULL( ) Function (100%)

MSDN Library - April 2000 > Visual Studio 6.0 Documentation > Visual FoxPro Documentation > Reference > A to Z Language Reference

[MSDN Library April 2000] IsNull Function (32.4402749605589%)

MSDN Library - April 2000 > Office Developer Documentation > Office 97 Documentation > Office > Microsoft Office 97/Visual Basic Language Reference > Volume 5 > Microsoft Visual Basic for Applications Language Reference

[MSDN Library April 2000] ISNULL (T-SQL) (29.335027100271%)

MSDN Library - April 2000 > Platform SDK > Data Access Services > Microsoft SQL Server Programmer's Toolkit > Building SQL Server Applications > Transact-SQL Reference

[MSDN Library April 2000] IsNull (22.1631701631702%)

MSDN Library - April 2000 > Windows CE Documentation > Visual Development Environment > Windows CE Toolkit for Visual Basic 6.0 > Programmer's Reference > Functions

[MSDN Library April 2000] IsNull Property (20.7592592592593%)

MSDN Library - April 2000 > Platform SDK > Management Services > Setup > Windows Installer > Automation Interface > Automation Interface Reference > Record Object