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 SemValInc()
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 Purpose:
 Increment a semaphore value by 1.

 Syntax:
 bResult = SemValInc( dwSemID )

 Parameters:
 dwSemID The semaphore ID number.

 Returns:
 A boolean value (TRUE or FALSE).

 Description:
 SemValInc() returns TRUE if the value of the semaphore specified by ID
 number dwSemID is incremented successfully.

 Returns FALSE if not, or if an error occurs.

 Example:
 // To open a semaphore called "UPDATE_SEM" with an initial value 24,
 // decrement it to use the resource and then increment it again:
 dwSemID = SemOpen( "UPDATE_SEM", 24 )
 if ( NWErrorGet() = 0 )
    if ( SemValDec( dwSemID ) )
       ....   // Perform function
       if ( SemValInc( dwSemID ) )
          ? "Semaphore incremented successfully"
       endif
    endif
 endif

 Notes:
 Semaphore values may be in the range -127 to 127. Attempts to
 increment a semaphore value beyond 127 result in an error.

 If FALSE is returned, check NWErrorGet().
 Note for CA-Clipper:
 IMPORTANT - both positive and negative values are valid semaphore handles,
 except the value NOVERRLONG. Valid semaphore handles can be in the range
 -2147483647 to +2147483647.