I'm trying to install the VCL source for Delphi 1 from
the Delphi RAD pack.  After adding the VCL directory
to the library search path and recompiling my program, I
get a compile error in VCL\CLASSES.PAS.

The error is in the function:

procedure TStream.WriteComponentRes(const ResName: string; Instance:
TComponent);
var
  HeaderSize: Integer;
  Origin, ImageSize: Longint;
  Header: array[0..79] of Char;
begin
  Byte((@Header[0])^) := $FF;
  Word((@Header[1])^) := 10;
  HeaderSize := StrLen(StrUpper(StrPLCopy(@Header[3], ResName, 63))) +
10;
  Word((@Header[HeaderSize - 6])^) := $1030;
  Longint((@Header[HeaderSize - 4])^) := 0;
  WriteBuffer(Header, HeaderSize);
  Origin := Position;
  WriteComponent(Instance);
  ImageSize := Position - Origin;
  Position := Origin - 4;
  WriteBuffer(ImageSize, SizeOf(Longint));
  Position := Origin + ImageSize;
end;

And occurs in the second line of the function body:
  Word((@Header[1])^) := 10;
The cursor is just before the semi-colon, and the error message is

Error 122 : Invalid variable reference

Any suggestions as to what the error means, and how I can get it to
compile?  I don't understand how the VCL source code could be shipped
but not compile! This makes me think there is something else that I
haven't done, but I don't know what...

Thanks,

Francis Irving
Vega Group PLC.

The error means that you are compiling with the wrong compiler
settings. You get this error when compiling with pointer type checking
turned on. Ususally this is only a safety check at compile time and
does not do any changes to the compiled code.

Just a warning: You will not be able to recompile the WHOLE VCL anyway
as a couple of sources (TabbedNotebook for instance) is missing.

I personally would be very interested in DBDsgn (or so) to fix a bug
in the implementation part of DB.PAS - but not luck...