[MSDN Library April 2000] IsCharAlpha (52.6245210727969%)
MSDN Library - April 2000 > Platform SDK > User Interface Services > Windows User Interface > Resources > Strings > String Reference > String Functions
[MSDN Library June 1998] IsCharAlpha (43.3272837265578%)
MSDN Library Visual Studio 6.0 > Platform SDK > Windows Base Services > General Library > String Manipulation > String Manipulation Reference > String Manipulation Functions
[MSDN Library April 2000] IsCharAlpha (39.2528735632184%)
MSDN Library - April 2000 > Windows CE Documentation > Application Development > API Reference > Core > Functions