[MSDN Library June 1998] ISBLANK( ) Function (100%)
MSDN Library Visual Studio 6.0 > Visual FoxPro Documentation > Reference > A to Z Language Reference
[MSDN Library June 1998] ISBLANK() Function Provides Additional Null Value Support (18.9799498746867%)
MSDN Library Visual Studio 6.0 > Knowledge Base > FoxPro