In the Electronic Books in iFix Workspace under the Help & Information in the system tree, select the 'Writing Scripts' for basic details on scripting.
The VB Editor also has help on basic functions etc.
For ifix objects, methods, functions etc goto the ifix Automation Reference. If you can't link through workspace then it's in the dynamics folder and in version 3.5 it's called 'fixvba', not sure what it's called in higher versions.