Function SetBlink() Foundation
Activates or deactivates the Blink attribute for colors in full screen text mode
SetBlink( [<lOnOff>] ) --> lOldSetting
The function returns the setting that was current before the call to SetBlink().
Since Xbase++ applications can run in character mode as well as in graphic mode, the Blink attribute is supported only if an Xbase++ application runs in full screen character mode. Otherwise it would degrade processing speed. When an application runs in a text mode window, the Blink attribute (*) is ignored and treated like the color attribute for a bright color (+).
This function has no effect under Windows. The Blink attribute is not supported and always treated like the color attribute for a bright color.
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