ModifyVDL

Changes one or more attributes of a VDL.

Synopsis

Err ModifyVDL (Item vdlItem,TagArg *vdlTags)

Err ModifyVDLVA (Item vdlItem,uint32 vdlTags,...)

Description

This call changes one or more attributes of a VDL. When executed, it looks through each entry of the VDL for opcodes, and then changes the specified attributes in each opcode (if they need changing). This means that ModifyVDL() affects the entire VDL, regardless of its type. It works equally well on simple VDLs and custom VDLs.

This is a preliminary implementation of ModifyVDL(). Future implementations will include the ability to modify individual VDL entries.

Arguments

vdlItem: Item number of the VDL to be modified.

vdlTags: Pointer to the array of TagArgs used to specify the modifications to the VDL.

Return Value

The call returns a 0 if successful or an error code (a negative value) if an error occurs.

Implementation

Folio call implemented in Graphics folio V21.

Associated Files

graphics.h, graphics.lib