PUTRAQQ RTP SLOT Enterprising third party software component developers saw opportunities to use the VBX specification for non-visual components, such as components for creating ZIP files, manipulating low-level system settings and communicating with TCP/IP. The VBX specification was created so that developers could extend Visual Basic. In computer programming, a Visual Basic Extension (commonly abbreviated VBX) or custom control, was the component model used in Microsoft Visual Basic versions 1.0 to 3.0. It is still supported in the 16-bit version of version 4.0, but was made obsolete by OCXs.|Play Calling System