From: grazynsk@petex.com.pl   
      
   > program foo;   
   >   
   > uses   
   >   testunit;   
   >   
   > begin   
   >   clrscr;  { Because the crt unit is already part of the 'testunit' ??   
   > }   
   >   hello;   
   > end.   
   >   
      
   TESTUNIT unit IS the client of CRT module, but program FOO is not the   
   client of the CRT module. Unless you explicitly put "CRT" into uses   
   clause in program FOO, you cannot call CLRSCR procedure.   
      
   "to be the client of module x" is not transitive relation.   
      
   regards   
      
   Andrew   
      
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