INFO: Visual Basic Reserves OCX Resource IDs Starting at 30000

SUMMARY

In accordance with the specifications for building and exposing ActiveX controls, Visual Basic uses a resource file to store the toolbox bitmaps for each UserControl in a compiled OCX. Design-time clients can then load and display these bitmap images in a "control toolbox" without having to load or create running instances of these controls.

By default, Visual Basic stores these images with a base resource identifier starting at 30000. Consequently, when adding your own resource file to a Visual Basic ActiveX control project, you should avoid using resource IDs that might conflict with these values.