[fpc-devel]Delphi incompatibity

[Pavel V. Ozerski]

Hello,
1) I tried to switch on properties in BP-style objects. My first attempt is very rough:
I disabled in  procedure property_dec (pdecobj.pas) initial checking for a class.
But my example not only can be compiled but also runs and gives correct result!

{$APPTYPE CONSOLE}
{$MODE OBJFPC}
type
 Tobj1=object
  private
   xx:longint;
  protected
    procedure SetX(Value:longint);
    procedure Init;virtual;
  public
    constructor Create;
    property X: longint read xx write SetX;
  end;

procedure TObj1.SetX(Value:longint);
 begin
  xx:=Value;
 end;


constructor TObj1.Create;
 begin
  Init;
 end;

procedure TObj1.Init;
 begin
  FillChar( Pointer( Integer( @Self ) + 8 )^, Sizeof( Self ) - 8, 0 );
//  Self.fRefCount := 0;
 end;


var
 Obj1:Tobj1;
begin
 Obj1.Create;
 Obj1.x:=1;
 writeln(Obj1.x);
end.

2) While my experiments I found a bug in Windows unit (really, in func.inc). This unit contains a reference to function
EnumTaskWindows as located in USER32.dll. But at least in NT 4 user32.dll does not contain this function. In Delphi 3 RTL
this function is implemented as

function EnumTaskWindows(hTask: THandle; lpfn: FARPROC; lParam: LPARAM): BOOL;
begin
  Result := EnumThreadWindows(DWORD(hTask), lpfn, lParam);
end;

I think, for Win32 better (and faster) would be

function EnumTaskWindows(hTask:HWND; lpfn:FARPROC; lParam: LPARAM): BOOL;stdcall;
 external 'user32' name 'EnumThreadWindows';

because in Win32 Thandle and DWORD are 4-byte integers.

Pavel