Paste WinForms Form into Inno Setup Wizard

Question

I need to embed a WinForms form (c BorderStyle = None) in the Inno Setup Wizard and have a problem.

Here is the installation of the Inno script:

procedure EmbedConfiguratorForm(parentWnd: HWND);
  external 'EmbedConfiguratorForm@files:configurator.dll stdcall';

procedure InitializeWizard();
var
  cfgPageHandle: HWND;
begin
  cfgPageHandle := CreateCustomPage(wpSelectDir, 
    'Configuration', 
    ExpandConstant(description)).Surface.Handle;
  EmbedConfiguratorForm(cfgPageHandle);
end;

Here is the C # code:

class WizardWindow : IWin32Window
{
    public WizardWindow(IntPtr handle)
    {
        Handle = handle;
    }

    public WizardWindow(int handle) : this(new IntPtr(handle))
    {
    }

    public IntPtr Handle { get; private set; }
}

public static class MainClass
{
    [DllExport("EmbedConfiguratorForm", CallingConvention.StdCall)]
    public static void EmbedConfiguratorForm(int parentWnd)
    {
        // System.Diagnostics.Debugger.Launch();
        ConfiguratorForm form = new ConfiguratorForm();
        form.Show(new WizardWindow(parentWnd));
    }
}

It works, but not as expected. After loading the settings, it automatically calls EmbedConfiguratorFormfrom configurator.dll, and the form is displayed, but not on the settings wizard page. It shows behind (see screenshot). So what am I doing wrong?

Answer 1

solvable.

The solution is to return the handle to the new window (form) from the DLL and use user32.SetParentthe WinAPI function to force the form into the wizard. Here is a snippet of code.

FROM#:

namespace configurator
{
    class WizardWindow : IWin32Window
    {
        public WizardWindow(IntPtr handle)
        {
            Handle = handle;
        }

        public WizardWindow(int handle) : this(new IntPtr(handle))
        {
        }

        public IntPtr Handle { get; private set; }
    }

    public static class MainClass
    {
        private static ConfiguratorForm _configuratorForm;

        [DllExport("EmbedConfiguratorForm", CallingConvention.StdCall)]
        public static IntPtr EmbedConfiguratorForm(int parentWnd)
        {
            _configuratorForm = new ConfiguratorForm();
            _configuratorForm.Show(new WizardWindow(parentWnd));
            return _configuratorForm.Handle;

        }

        [DllExport("CloseConfiguratorForm", CallingConvention.StdCall)]
        public static void CloseConfiguratorForm()
        {
            if (_configuratorForm != null)
            {
                _configuratorForm.Close();
                _configuratorForm.Dispose();
                _configuratorForm = null;
            }
        }
    }
}

Inno Setup script:

[Code]
const
  description = 'my page description';

var
  configFile: string;
  configuratorPage: TWizardPage;

function EmbedConfiguratorForm(parentWnd: HWND): HWND;
external 'EmbedConfiguratorForm@files:configurator.dll stdcall';

procedure CloseConfiguratorForm();
external 'CloseConfiguratorForm@files:configurator.dll stdcall';

function SetParent(hWndChild, hWndNewParent: HWND): HWND;
external '[e-mail] stdcall';

procedure InitializeWizard();
begin
  configuratorPage := CreateCustomPage(wpSelectDir, 
    'Title', 'Description');
end;

procedure ShowConfigurationStep();
var
  cfgPageHandle: HWND;
  cfgWinHandle: HWND;
begin
  cfgPageHandle := configuratorPage.Surface.Handle;
  cfgWinHandle := EmbedConfiguratorForm(cfgPageHandle);
  SetParent(cfgWinHandle, cfgPageHandle);
end;

procedure CurPageChanged(CurPageId: Integer);
begin
  if (CurPageId = configuratorPage.ID) then
  begin
    ShowConfigurationStep();
  end else
  begin
    CloseConfiguratorForm(); // here we can make some optimization like checking previos page
  end;
end;

procedure DeinitializeSetup();
begin
  CloseConfiguratorForm();
end;

# DLL:
UnmanagedExports NuGet ( DLLExportAttribute).

Inno Setup script:
InitializeWizard , DLL CurPageChanged, , .

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, .Net InnoSetup

https://github.com/sharpcoder7/innoGlue.net