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The VBX specification was created so that developers could extend Visual Basic . According to rumor, Bill Gates reviewed the first version of Visual Basic before release and told the development team that it must have an extensibility mechanism. Visual Basic 4.0 added support for the newer OLE Controls or OCXs (which became '''ActiveX''' controls), implicitly deprecating VBX controls. OCXs are based on the Component Object Model . Each version of Visual Basic has come with many controls. By incorporating VBX controls into Visual Basic, Microsoft spawned the first commercially viable market for reusable Software Component s. Third Parties have created a large market of custom controls for resale. VBX components were called "custom controls" because the Microsoft development team envisioned them as visual "control" components like a toggle switch or button. Enterprising Third Party Software Component developers saw opportunities to use the VBX specification for non-visual components, such as components for creating ZIP Files , messing with low-level system settings and communicating with TCP/IP , making the term "control" somewhat of a misnomer, though it is still frequently used even by VB.NET developers. |
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