Delphi32 - Convert Hexadecimal to Integer

Function if_trimSurface(atoi:pchar):Boolean;
Begin result:=false; 
      if (atoi=nil) or (atoi^=#0) then exit;
      while (atoi^ in [#9,#10,#13,#32]) do 
          do begin inc(atoi);result:=true;End;
End;

Function php_hexdec(atoi:pchar;hextoint:shortstring;elseerror:integer):Integer;
Var axlock:integer;
Begin axlock:=0;
    if (atoi=nil) or (atoi^=#0) then atoi:=nil;
      if (length(hextoint)>1) then 
        Begin hextoint:=concat('$'+trim(hextoint));
              Val(hextoint, Result, axlock.h);
              if axlock= 0 then exit;
        End;
       if (false=if_trimSurface(atoi)) then exit;
       hextoint:=copy(strpas(atoi),1,127);
       Val(hextoint,result,axlock);
       if (axlock<>0) then result:=elseerror;
End;