All Functions

By Categories

Accounting Functions 

Array Functions

C Level API Functions

Check Functions

Class Functions

Conversion Functions

Clipper Tools Set Functions

Database Functions

Date / Time Functions

Error Handling Functions

Drives, Folders, and Files Functions

Garbage Collection Functions

Hashe Functions

Idle Functions

Index / Order Functions

hvm Functions

inet Functions

Internal Functions

Language and Nation Functions

Macro Functions

Math Functions

Memo Functions

Menu Functions

Misc Functions

Network Functions

Objects Functions

Set Functions

String Functions

Terminal Functions

UI – Input Functions

User interface Functions

Variable Management Functions

Beware : This guide isn’t complete; and building a complete Harbour functions guide is impossible, at least for me 😦