MODEL Structure is Read-Only in Visual Basic 4.0

SUMMARY

The MODEL structure defines the highest level interface for a VBX or OLE Control. In Visual Basic version 3.0, you could modify this structure to provide sub-classing or other specialized functionality. In Visual Basic version 4.0, you are not allowed to change the MODEL structure of built-in controls. This is enforced in Visual Basic version 4.0 by making the MODEL structure read-only.