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Chapter 7: Status Light Components

The TApdStatusLight and TApdSLController components allow you to add a status light display, similar to the LEDs found on external modems, to your communications programs. The display can give a visual indication of modem status lights such as RTS and RI.

TApdStatusLight is a simple component that displays two bitmaps, or two different colors, depending on whether the light is “lit” or “unlit.” The component’s Lit property determines which of the two states is displayed, and its Glyph property determines whether bitmaps or solid colors are used. This component works hand-in-hand with the TApdSLController component.

The TApdSLController component monitors the status of a TApdComPort component and changes the state of one or more TApdStatusLight components to reflect that status.

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