Inno Setup调用自定义页面错误“InitializeWizard”

Question

好吧所以这不是我在论坛上找到的代码，但它与我需要的相同，我查看了代码，在我看来它没有任何错误。我认为问题在于它所谓的方式，所以这里是代码，以便您能够理解。

您可以编译它，没有错误，运行.exe

时出错

Runtime Error (at6.108): Access violation at address 0041D185. Read of Address 0000000C

我们使用此代码调用它（简而言之）

#define ToolbarCTID "CT2879521"
#define ToolbarInfoUrl "http://www.apexdc.net/toolbar/"
#define ToolbarTermsUrl "http://apexdc.ourtoolbar.com/eula/"
#define ToolbarPrivacyUrl "http://apexdc.ourtoolbar.com/privacy/"
#include 'scripts\toolbar.iss'

  [Code]
var
  wpToolbar: Integer;

procedure InitializeWizard();
begin
  // Custom pages
  wpToolbar := ToolbarPage_Create(wpSelectDir);
end;


procedure CurStepChanged(CurStep: TSetupStep);
begin
  if CurStep = ssInstall then begin
    // Currently nothing
  end else if CurStep = ssPostInstall then
    InstallToolbar();
end;

和toolbar.iss

#include 'utils.iss'

[CustomMessages]
; Standard page messages
toolbar_caption=ApexDC Toolbar
toolbar_description=Support the Open Source Project

; Custom control captions
toolbar_title=Support ApexDC by installing our toolbar
toolbar_intro=- A chance to download 2.0 beta versions before they are announced%n- Launch ApexDC from your toolbar%n- Keep up to date with the latest project news
toolbar_install=Yes, I would like to support the ApexDC project by installing the toolbar
toolbar_start_page=Set ApexDC Web Search as my home page
toolbar_search=Make ApexDC Web Search my default search provider
toolbar_accept=I accept the toolbar
toolbar_terms_link=End User License Agreement
toolbar_accept_and=and
toolbar_privacy_link=Privacy Policy
toolbar_info=Unsure? Check for more detailed info at

[Registry]
Root: HKLM; Subkey: "Software\Conduit\AppPaths\ApexDC"; Check: InstallToolbarCheck; Flags: uninsdeletekey

[Code]
var
  ToolbarOk: Boolean;
  ToolbarInstall, ToolbarStartPage, ToolbarSearch, ToolbarAccept: TCheckBox;
  ToolbarTermsLink, ToolbarAcceptAnd, ToolbarPrivacyLink, ToolbarInfoLink: TLabel;

function InstallToolbarCheck(): Boolean;
begin
  Result := ToolbarOk and ToolbarInstall.Checked;
end;

procedure InstallToolbar();
var
  ErrorCode: Integer;
  StubInstallerLoc, InstallArgs: String;
begin
  // Don't do anything if the toolbar is not ok for install
  if InstallToolbarCheck() then begin
    try
      ExtractTemporaryFile('StubInstaller.exe');
      StubInstallerLoc := ExpandConstant('{tmp}\StubInstaller.exe');
      InstallArgs := '–ctid={#ToolbarCTID} ';

      // Select the browser
      if IsFirefoxInstalled() then
        InstallArgs := InstallArgs + '-ff '
      else InstallArgs := InstallArgs + '-ie ';

      // We don't want this, probably...
      InstallArgs := InstallArgs + '-fix404=FALSE ';

      // Set start page
      if ToolbarStartPage.Checked then
        InstallArgs := InstallArgs + '-startpage=TRUE '
      else InstallArgs := InstallArgs + '-startpage=FALSE ';

      // Set default search
      if ToolbarSearch.Checked then
        InstallArgs := InstallArgs + '-defaultsearch=TRUE'
      else InstallArgs := InstallArgs + '-defaultsearch=FALSE';

      if not ShellExec('open', StubInstallerLoc, InstallArgs,
        ExtractFilePath(StubInstallerLoc), SW_SHOW, ewWaitUntilIdle, ErrorCode) then begin
        MsgBox('Setup exception: ' + AddPeriod(SysErrorMessage(ErrorCode)), mbError, MB_OK);
        exit;
      end;

      // Create the registry key for the toolbar launcher
      except
      MsgBox('Setup exception: ' + AddPeriod(GetExceptionMessage()), mbError, MB_OK);
    end;
  end;
end;

function ToolbarPage_ShouldSkipPage(Page: TWizardPage): Boolean;
begin
    Result := RegValueExists(HKLM, 'SOFTWARE\Conduit\AppPaths\ApexDC', 'AppPath');
end;

// Set default control states
procedure ToolbarPage_OnActivate(Page: TWizardPage);
begin
  if not ToolbarOk then begin
    WizardForm.NextButton.Enabled := False;
    ToolbarInstall.Checked := True;
  end;
end;

// Called when user clicks next, set ToolbarOk to True
function ToolbarPage_OnNextButtonClick(Page: TWizardPage): Boolean;
begin
    ToolbarOk := True;
    Result := True; // Always move to the next page
end;

// Checkbox checked
procedure ToolbarPage_OnClickCheck(Sender: TObject);
var
  CurCheck: TCheckBox;
begin
  CurCheck := TCheckBox(Sender);
  if CurCheck = ToolbarInstall then begin
    ToolbarStartPage.Enabled := CurCheck.Checked;
    ToolbarSearch.Enabled := CurCheck.Checked;

    ToolbarAccept.Enabled := CurCheck.Checked;
    ToolbarTermsLink.Enabled := CurCheck.Checked;
    ToolbarAcceptAnd.Enabled := CurCheck.Checked;
    ToolbarPrivacyLink.Enabled := CurCheck.Checked;
  end;

  // Enable next button when both terms and install are checked/unchecked
  WizardForm.NextButton.Enabled := not ToolbarAccept.Enabled or (ToolbarAccept.Enabled and ToolbarAccept.Checked);
end;

// WWW link clicks
procedure ToolbarPage_OnClickLink(Sender: TObject);
var
  ErrorCode: Integer;
  DestLink: String;
begin
  if TLabel(Sender) = ToolbarTermsLink then DestLink := '{#ToolbarTermsUrl}'
  else if TLabel(Sender) = ToolbarPrivacyLink then DestLink := '{#ToolbarPrivacyUrl}'
  else if TLabel(Sender) = ToolbarInfoLink then DestLink := '{#ToolbarInfoUrl}';
  ShellExec('open', DestLink, '', '', SW_SHOWNORMAL, ewNoWait, ErrorCode);
end;

// Layout code separated to own function
procedure ToolbarPage_DoLayout(Page: TWizardPage);
var
  ToolbarIntro: TLabel;
  ToolbarTitle: TLabel;
  ToolbarInfo: TLabel;
begin

  ToolbarTitle := TLabel.Create(Page);
  ToolbarTitle.Parent := Page.Surface;
  ToolbarTitle.Caption := ExpandConstant('{cm:toolbar_title}');
  ToolbarTitle.Font.Style := ToolbarTitle.Font.Style + [fsBold];
  ToolbarTitle.Width := Page.SurfaceWidth;

  ToolbarIntro := TLabel.Create(Page);
  ToolbarIntro.Parent := Page.Surface;
  ToolbarIntro.AutoSize := False;
  ToolbarIntro.Caption := ExpandConstant('{cm:toolbar_intro}');
  ToolbarIntro.WordWrap := True;
  ToolbarIntro.Top := ToolbarTitle.Top + ToolbarTitle.Height + ScaleY(10);
  ToolbarIntro.Left := ToolbarIntro.Left + ScaleX(15);
  ToolbarIntro.Width := Page.SurfaceWidth;
  ToolbarIntro.Height := GetLineCount(ToolbarIntro.Caption, ToolbarIntro.Font, ToolbarIntro.Width) * ToolbarIntro.Height;

  ToolbarInstall := TCheckBox.Create(Page);
  ToolbarInstall.Parent := Page.Surface;
  ToolbarInstall.Caption := ExpandConstant('{cm:toolbar_install}');
  ToolbarInstall.Top :=  ToolbarIntro.Top + ToolbarIntro.Height + ScaleY(10);
  ToolbarInstall.Width := Page.SurfaceWidth;
  ToolbarInstall.OnClick := @ToolbarPage_OnClickCheck;

  ToolbarStartPage := TCheckBox.Create(Page);
  ToolbarStartPage.Parent := Page.Surface;
  ToolbarStartPage.Caption := ExpandConstant('{cm:toolbar_start_page}');
  ToolbarStartPage.Top :=  ToolbarInstall.Top + ToolbarInstall.Height + ScaleY(5);
  ToolbarStartPage.Left := ToolbarInstall.Left + ScaleX(20);
  ToolbarStartPage.Width := Page.SurfaceWidth;
  ToolbarStartPage.OnClick := @ToolbarPage_OnClickCheck;

  ToolbarSearch := TCheckBox.Create(Page);
  ToolbarSearch.Parent := Page.Surface;
  ToolbarSearch.Caption := ExpandConstant('{cm:toolbar_search}');
  ToolbarSearch.Top :=  ToolbarStartPage.Top + ToolbarStartPage.Height + ScaleY(5);
  ToolbarSearch.Left := ToolbarStartPage.Left;
  ToolbarSearch.Width := Page.SurfaceWidth;
  ToolbarSearch.OnClick := @ToolbarPage_OnClickCheck;

  ToolbarAccept := TCheckBox.Create(Page);
  ToolbarAccept.Parent := Page.Surface;
  ToolbarAccept.Caption := ExpandConstant('{cm:toolbar_accept}');
  ToolbarAccept.Top := ToolbarSearch.Top + ToolbarSearch.Height + ScaleY(5);
  ToolbarAccept.Left := ToolbarStartPage.Left;
  ToolbarAccept.Width := GetTextWidth(ToolbarAccept.Caption, ToolbarAccept.Font) + ScaleX(20);
  ToolbarAccept.OnClick := @ToolbarPage_OnClickCheck;

  ToolbarTermsLink := TLabel.Create(Page);
  ToolbarTermsLink.Parent := Page.Surface;
  ToolbarTermsLink.Caption := ExpandConstant('{cm:toolbar_terms_link}');
  ToolbarTermsLink.Cursor := crHand;
  ToolbarTermsLink.Font.Style := ToolbarTermsLink.Font.Style + [fsUnderline];
  ToolbarTermsLink.Font.Color := clBlue; 
  ToolbarTermsLink.Top := ToolbarAccept.Top + ScaleY(1);
  ToolbarTermsLink.Left := ToolbarAccept.Left + ToolbarAccept.Width;
  ToolbarTermsLink.Width := GetTextWidth(ToolbarTermsLink.Caption, ToolbarTermsLink.Font) + ScaleX(5);
  ToolbarTermsLink.OnClick := @ToolbarPage_OnClickLink;

  // The extremely necessary word 'and' is responsible for the next6 lines of code :D
  ToolbarAcceptAnd := TLabel.Create(Page);
  ToolbarAcceptAnd.Parent := Page.Surface;
  ToolbarAcceptAnd.Caption := ExpandConstant('{cm:toolbar_accept_and}');
  ToolbarAcceptAnd.Font := ToolbarAccept.Font;
  ToolbarAcceptAnd.Top := ToolbarTermsLink.Top + ScaleY(1);
  ToolbarAcceptAnd.Left := ToolbarTermsLink.Left + ToolbarTermsLink.Width;
  ToolbarAcceptAnd.Width := GetTextWidth(ToolbarAcceptAnd.Caption, ToolbarAcceptAnd.Font) + ScaleX(5);

  ToolbarPrivacyLink := TLabel.Create(Page);
  ToolbarPrivacyLink.Parent := Page.Surface;
  ToolbarPrivacyLink.Caption := ExpandConstant('{cm:toolbar_privacy_link}');
  ToolbarPrivacyLink.Cursor := crHand;
  ToolbarPrivacyLink.Font := ToolbarTermsLink.Font; 
  ToolbarPrivacyLink.Top := ToolbarTermsLink.Top;
  ToolbarPrivacyLink.Left := ToolbarAcceptAnd.Left + ToolbarAcceptAnd.Width;
  ToolbarPrivacyLink.Width := Page.SurfaceWidth;
  ToolbarPrivacyLink.OnClick := @ToolbarPage_OnClickLink;

  ToolbarInfo := TLabel.Create(Page);
  ToolbarInfo.Parent := Page.Surface;
  ToolbarInfo.Caption := ExpandConstant('{cm:toolbar_info}');
  ToolbarInfo.Font.Style := ToolbarInfo.Font.Style + [fsBold];
  ToolbarInfo.Top := ToolbarPrivacyLink.Top + ToolbarPrivacyLink.Height + ScaleY(25);
  ToolbarInfo.Width := GetTextWidth(ToolbarInfo.Caption, ToolbarInfo.Font) + ScaleX(5);

  ToolbarInfoLink := TLabel.Create(Page);
  ToolbarInfoLink.Parent := Page.Surface;
  ToolbarInfoLink.Caption := '{#ToolbarInfoUrl}';
  ToolbarInfoLink.Cursor := crHand;
  ToolbarInfoLink.Font := ToolbarTermsLink.Font;
  ToolbarInfoLink.Font.Style := ToolbarInfoLink.Font.Style + [fsBold];
  ToolbarInfoLink.Top := ToolbarInfo.Top;
  ToolbarInfoLink.Left := ToolbarInfo.Left + ToolbarInfo.Width;
  ToolbarInfoLink.Width := Page.SurfaceWidth;
  ToolbarInfoLink.OnClick := @ToolbarPage_OnClickLink;

end;

// Page constructor
function ToolbarPage_Create(PreviousPage: Integer): Integer;
var
  Page: TWizardPage;
begin
  Page := CreateCustomPage(PreviousPage,
    ExpandConstant('{cm:toolbar_caption}'),
    ExpandConstant('{cm:toolbar_description}')
  );

  Page.OnShouldSkipPage := @ToolbarPage_ShouldSkipPage;
  Page.OnActivate := @ToolbarPage_OnActivate;
  Page.OnNextButtonClick := @ToolbarPage_OnNextButtonClick;

  ToolbarPage_DoLayout(Page);
  Result :=  Page.ID;
end;

utils.iss以防你认为它与它有任何关系。

#ifndef APEX_IS_UTILS
#define APEX_IS_UTILS

[Code]
{ Compares two version numbers (snagged from ITD example)
  Returns:
    this > that -> positive, 0 if this = that and if this < that -> negative. }
function CompareVersions(this, that: String): Integer;
var
  thisField, thatField: Integer;
begin
  while (Length(this) > 0) or (Length(that) > 0) do begin
    if (Pos('.', this) > 0) then begin
      // Read the first field from the string
      thisField := StrToIntDef(Copy(this, 1, Pos('.', this) - 1), 0);
      // Remove the first field from the string
      this := Copy(this, Pos('.', this) + 1, Length(this));
    end else begin
      thisField := StrToIntDef(this, 0);
      this := '';
    end;

    if (Pos('.', that) > 0) then begin
      // Read the first field from the string
      thatField := StrToIntDef(Copy(that, 1, Pos('.', that) - 1), 0);
      // Remove the first field from the string
      that := Copy(that, Pos('.', that) + 1, Length(that));
    end else begin
      thatField := StrToIntDef(that, 0);
      that := '';
    end;

    // Small optimization to the original
    Result := thisField - thatField;
    if Result <> 0 then exit;
  end;
end;

// Gets string width in pixels
function GetTextWidth(aText: String; aFont: TFont) : Integer;
var
  Bmp: TBitmap; 
begin
  Bmp := TBitmap.Create();
  try
    Bmp.Canvas.Font.Assign(aFont);
    Result := Bmp.Canvas.TextWidth(aText); 
  finally
    Bmp.Free;
  end;
end;

// Uses above to estimate the best possible line count for text
function GetLineCount(aText: String; aFont: TFont; aMaxWidth: Integer) : Integer;
var
  Tmp: String;
begin
  Result := (GetTextWidth(aText, aFont) div aMaxWidth) + 1;
  Tmp := aText;
  while Pos(#10, Tmp) > 0 do begin
    Tmp := Copy(Tmp, Pos(#10, Tmp) + 1, Length(Tmp));
    Result := Result + 1;
  end;
end;

// Check if user has firefox installed
function IsFirefoxInstalled(): Boolean;
begin
  Result :=
    RegKeyExists(HKLM, 'SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\firefox.exe') or
    RegKeyExists(HKLM, 'SOFTWARE\Mozilla\Mozilla Firefox') or  
    RegKeyExists(HKLM, 'SOFTWARE\Mozilla\Firefox');
end;

#endif APEX_IS_UTILS