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VXM Driver Documentation - Visual C 6 - PortIsOpen
 
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All functions assume you followed directions in the "How To Add To Your Project"

PortIsOpen

The "PortIsOpen" function is used to determine if a port is already opened within your program.

Syntax:
      long PortIsOpen(void)

Parameters:
     
           

Returns:
      0 if closed
      1 if open

Example:
      CallPortIsOpen = PortIsOpen();

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