Retrieves the vale of an internal switch set on the command line.


      HB_ArgString( <cSwitch> ) --> <cValue>


<cSwitch> : A string holding the symbolic name of of an internal switch


If exist <cSwitch> in command line, remain of this switch in the argument, else a null string


There are two kind of internal switches : prefixed and regular. Prefixed internal switches always have two slashes as prefix. This function return value of a prefixed switch.


      // If command line is :  C:\temp>test.exe p1 p2 //p3
      ? HB_ArgString( 'p' ) // 3


HB_ArgShift(), HB_ArgC(), HB_ArgCheck(), HB_ArgV(), PCount(), HB_PValue(), HB_AParams()

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