New blog

My friend Bart Duncan is now blogging.  Bart is one of the top SQL Server performance experts in the world. You can find his new blog here on MSDN at https://blogs.msdn.com/bartd.

Comments

• Anonymous
  July 24, 2006
  Hello
  I recently purchased a second hand copy of "Database Developer's Guide with Delphi 2".  ISBN 0-672-30862-2.
  The copy I purchased did not come with a CD.
  I am currently working through the project detailed in the book, but it keeps failing to compile.
  
  The current problem I am working on is the DLL, which is detailed on page 327, I have typed the code in word for word about 20 times and I keep getting the following error;
  
  [error] Reputils.dpr[25]: Types of actual and formal var parameters must be identical
  
  The code I copied out the book is;
  
  library Reputils;
  
  { Important note about DLL memory management: ShareMem must be the
   first unit in your library's USES clause AND your project's (select
   Project-View Source) USES clause if your DLL exports any procedures or
   functions that pass strings as parameters or function results. This
   applies to all strings passed to and from your DLL--even those that
   are nested in records and classes. ShareMem is the interface unit to
   the BORLNDMM.DLL shared memory manager, which must be deployed along
   with your DLL. To avoid using BORLNDMM.DLL, pass string information
   using PChar or ShortString parameters. }
  
  uses
   SysUtils,
   Classes,
   Windows;
  
  function GetWindowsUserName(UserName : PChar) : PChar; stdcall; export;
  var
   Name : Array[0..30] of char;
   NameLen : Integer;
  
  begin
   NameLen := sizeof(Name);
   If GetUserName(Name, NameLen) then StrCopy(UserName,Name)
   else StrCopy(UserName, 'UNKNOWN');
   Result := UserName;
  end;
  
  exports
   GetWindowsUserName;
  end.
  
  I would be grateful for any help, if someone has a copy of the source code for the RentMan (RentalMan) program which came on the CD I would be very grateful if they would let me know.
  
  regards
  
  Adrian
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