Delphi7 TTabControl 64ビットOSでOwnerDRawが効かない (ID：150719)

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igyさん ありがとうございます。

VCLFixesをプロジェクトに含めているのですが、まったく変わらないのです（＝ω＝；）
単に、プロジェクトに含めてコンパイルするだけでは交換がないのでしょうか？？
以下が、VCLFixes.pasの内容です。

unit VCLFixes;

interface

implementation

uses
  Messages, Windows, Controls, Dialogs;

// WMDrawItem fails under WOW64, see http://qc.codegear.com/wc/qcmain.aspx?d=19859

{$IFDEF VER150} // Delphi7

function GetMethodAddress(AMessageID: Word; AClass: TClass; out MethodAddr: Pointer): Boolean;
var
  DynamicTableAddress: Pointer;
  MethodEntry: ^Pointer;
  MessageHandlerList: PWord;
  EntryCount, EntryIndex: Word;
begin
  Result := False;

DynamicTableAddress := Pointer(PInteger(Integer(AClass) + vmtDynamicTable)^);
  MessageHandlerList := PWord(DynamicTableAddress);
  EntryCount := MessageHandlerList^;

if EntryCount > 0 then
    for EntryIndex := EntryCount - 1 downto 0 do
  begin
    Inc(MessageHandlerList);
    if (MessageHandlerList^ = AMessageID) then
    begin
      Inc(MessageHandlerList);
      MethodEntry := Pointer(Integer(MessageHandlerList) + 2 * (2 * EntryCount - EntryIndex) - 4);
      MethodAddr := MethodEntry^;
      Result := True;
    end;
  end;
end;

function PatchInstructionByte(MethodAddress: Pointer; ExpectedOffset: Cardinal;
                              ExpectedValue: Byte; NewValue: Byte): Boolean;
var
  BytePtr: PByte;
  OldProtect: Cardinal;
begin
  Result := False;

BytePtr := PByte(Cardinal(MethodAddress) + ExpectedOffset);

if BytePtr^ = NewValue then
  begin
    Result := True;
    Exit;
  end;

if BytePtr^ <> ExpectedValue then
    Exit;

if VirtualProtect(BytePtr, SizeOf(BytePtr^), PAGE_EXECUTE_READWRITE, OldProtect) then
  begin
    try
      BytePtr^ := NewValue;
      Result := True;
    finally
      Result := Result
        and VirtualProtect(BytePtr, SizeOf(BytePtr^), OldProtect, OldProtect)
        and FlushInstructionCache(GetCurrentProcess, BytePtr, SizeOf(BytePtr^));
    end;
  end;
end;

function PatchInstructionBytes(MethodAddress: Pointer; ExpectedOffset: Cardinal;
                               const ExpectedValues: array of Byte; const NewValues: array of Byte;
                               const PatchedValues: array of Byte): Boolean;
var
  BytePtr, TestPtr: PByte;
  OldProtect, Index, PatchSize: Cardinal;
begin
  BytePtr := PByte(Cardinal(MethodAddress) + ExpectedOffset);

Result := True;
  TestPtr := BytePtr;
  for Index := Low(PatchedValues) to High(PatchedValues) do
  begin
    if TestPtr^ <> PatchedValues[Index] then
    begin
      Result := False;
      Break;
    end;
    Inc(TestPtr);
  end;

if Result then
    Exit;

Result := True;
  TestPtr := BytePtr;
  for Index := Low(ExpectedValues) to High(ExpectedValues) do
  begin
    if TestPtr^ <> ExpectedValues[Index] then
    begin
      Result := False;
      Exit;
    end;
    Inc(TestPtr);
  end;

PatchSize := Length(NewValues) * SizeOf(Byte);

if VirtualProtect(BytePtr, PatchSize, PAGE_EXECUTE_READWRITE, OldProtect) then
  begin
    try
      TestPtr := BytePtr;
      for Index := Low(NewValues) to High(NewValues) do
      begin
        TestPtr^ := NewValues[Index];
        Inc(TestPtr);
      end;
      Result := True;
    finally
      Result := Result
        and VirtualProtect(BytePtr, PatchSize, OldProtect, OldProtect)
        and FlushInstructionCache(GetCurrentProcess, BytePtr, PatchSize);
    end;
  end;
end;

procedure PatchWinControl;
var
  MethodAddress: Pointer;
begin
  if not GetMethodAddress(WM_DRAWITEM, TWinControl, MethodAddress) then
  begin
    ShowMessage('Cannot find WM_DRAWITEM handler in TWinControl');
    Exit;
  end;
  if (not PatchInstructionByte(MethodAddress, 13, $4, $14)) // release and package
     and (not PatchInstructionByte(MethodAddress, 23, $4, $14)) then  // debug
    ShowMessage('Cannot patch WM_DRAWITEM');

if not GetMethodAddress(WM_COMPAREITEM, TWinControl, MethodAddress) then
  begin
    ShowMessage('Cannot find WM_COMPAREITEM handler in TWinControl');
    Exit;
  end;
  if (not PatchInstructionByte(MethodAddress, 13, $04, $8)) // release and package
     and (not PatchInstructionByte(MethodAddress, 23, $04, $8)) then  // debug
    ShowMessage('Cannot patch WM_COMPAREITEM handler');

if not GetMethodAddress(WM_DELETEITEM, TWinControl, MethodAddress) then
  begin
    ShowMessage('Cannot find WM_DELETEITEM handler in TWinControl');
    Exit;
  end;
  if (not PatchInstructionByte(MethodAddress, 13, $04, $0C)) // release and package
     and (not PatchInstructionByte(MethodAddress, 23, $04, $0C)) then  // debug
    ShowMessage('Cannot patch WM_DELETEITEM handler');

if not GetMethodAddress(WM_MEASUREITEM, TWinControl, MethodAddress) then
  begin
    ShowMessage('Cannot find WM_MEASUREITEM handler in TWinControl');
    Exit;
  end;
  if (not PatchInstructionBytes(MethodAddress, 10, [$08, $8B], [$04, $90, $90, $90], [$04, $E8])) // release and package
     and (not PatchInstructionBytes(MethodAddress, 20, [$08, $8B], [$04, $90, $90, $90], [$04, $E8])) then  // debug
    ShowMessage('Cannot patch WM_MEASUREITEM handler');
end;

{$ENDIF}

// end of "WMDrawItem fails under WOW64" patch ------------------------------------------

initialization
{$IF defined(VER150) or defined(VER170)} // Delphi 7 , 2005
{$IFEND}
end.

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