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 SPXVersionNumberGet()
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 Purpose:
 Get the SPX version number.

 Syntax:
 lpszVerNum = SPXVersionNumberGet()

 Parameters:
 None.

 Returns:
 A character string of length 4.

 The CA-Clipper name for this function is:
 SPXVerNumGet()

 Description:
 SPXVersionNumberGet() returns the SPX version being used by the calling
 workstation. Returns an empty string if SPX is not running or if an error
 has occurred.

 Example:
 // To find out if SPX is loaded and the SPX version in use:
 if( SPXInstalled() )
    ? "SPX is installed and running OK"
    ? "The SPX version is ", SPXVersionNumberGet()
 else
    ? "SPX is NOT installed"
 endif