Inno Setup中怎样做个卸载前的显示即将卸载的程序路径的对话框

在InnoSetup中该怎么做呢？

You will need to create a custom form (CreateCustomForm()) or use a simple message box (MsgBox()) in the CurUninstallStepChanged(usUninstall) event function.

; Script generated by the Inno Setup Script Wizard.
; SEE THE DOCUMENTATION FOR DETAILS ON CREATING INNO SETUP SCRIPT FILES!
#define MyAppName "My Program"
#define MyAppVersion "1.5"
#define MyAppPublisher "My Company, Inc."
#define MyAppURL "http://www.example.com/"
#define MyAppExeName "MyProg.exe"
[Setup]
; NOTE: The value of AppId uniquely identifies this application.
; Do not use the same AppId value in installers for other applications.
; (To generate a new GUID, click Tools | Generate GUID inside the IDE.)
AppId={{155A0EFE-4F28-4179-849B-A7AD8F7BE671}
AppName={#MyAppName}
AppVersion={#MyAppVersion}
;AppVerName={#MyAppName} {#MyAppVersion}
AppPublisher={#MyAppPublisher}
AppPublisherURL={#MyAppURL}
AppSupportURL={#MyAppURL}
AppUpdatesURL={#MyAppURL}
DefaultDirName={pf}\{#MyAppName}
DefaultGroupName={#MyAppName}
OutputBaseFilename=setup
Compression=lzma
SolidCompression=yes
[Languages]
Name: "english"; MessagesFile: "compiler:Default.isl"
[Tasks]
Name: "desktopicon"; Description: "{cm:CreateDesktopIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked
[Files]
Source: "C:\Program Files (x86)\Inno Setup 5\Examples\MyProg.exe"; DestDir: "{app}"; Flags: ignoreversion
; NOTE: Don't use "Flags: ignoreversion" on any shared system files
[Icons]
Name: "{group}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"
Name: "{commondesktop}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"; Tasks: desktopicon
[Run]
Filename: "{app}\{#MyAppExeName}"; Description: "{cm:LaunchProgram,{#StringChange(MyAppName, "&", "&&")}}"; Flags: nowait postinstall skipifsilent
[code]
function AskPassword(): Boolean;
var
   Form: TSetupForm;
   OKButton, CancelButton: TButton;
   PwdEdit: TPasswordEdit;
begin
   Result := false;
   Form := CreateCustomForm();
   try
Form.ClientWidth := ScaleX(256);
Form.ClientHeight := ScaleY(100);
Form.Caption := '密码验证';
Form.BorderIcons := [biSystemMenu];
Form.BorderStyle := bsDialog;
Form.Center;
OKButton := TButton.Create(Form);
OKButton.Parent := Form;
OKButton.Width := ScaleX(75);
OKButton.Height := ScaleY(23);
OKButton.Left := Form.ClientWidth - ScaleX(75 + 6 + 75 + 50);
OKButton.Top := Form.ClientHeight - ScaleY(23 + 10);
OKButton.Caption := '确定';
OKButton.ModalResult := mrOk;
OKButton.Default := true;
CancelButton := TButton.Create(Form);
CancelButton.Parent := Form;
CancelButton.Width := ScaleX(75);
CancelButton.Height := ScaleY(23);
CancelButton.Left := Form.ClientWidth - ScaleX(75 + 50);
CancelButton.Top := Form.ClientHeight - ScaleY(23 + 10);
CancelButton.Caption := '取消';
CancelButton.ModalResult := mrCancel;
CancelButton.Cancel := True;
PwdEdit := TPasswordEdit.Create(Form);
PwdEdit.Parent := Form;
PwdEdit.Width := ScaleX(210);
PwdEdit.Height := ScaleY(23);
PwdEdit.Left := ScaleX(23);
PwdEdit.Top := ScaleY(23);
Form.ActiveControl := PwdEdit;
if Form.ShowModal() = mrOk then
begin
   Result := PwdEdit.Text = 'bw12345678';
   if not Result then
         MsgBox('密码错误', mbInformation, MB_OK);
end;
   finally
Form.Free();
   end;
end;

function InitializeUninstall(): Boolean;
begin

         result:= AskPassword();
end;