将WinForms表单嵌入到Inno Setup向导中

Alexey Kulikov 发表于 Dev

阿列克谢·库里科夫（Alexey Kulikov）

我需要将WinForms表单（带有BorderStyle = None）嵌入到Inno Setup Wizard中，并出现问题。

这是一个Inno Setup脚本：

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;

这是一个C＃代码：

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));
    }
}

它有效，但未达到预期效果。安装程序加载后，它会自动EmbedConfiguratorForm从调用configurator.dll并显示表单，但不会进入安装向导页面。它显示在后面（请参见屏幕截图）。那我在做什么错？

阿列克谢·库里科夫（Alexey Kulikov）

解决了。

解决方案是从DLL返回新窗口（窗体）的句柄，并使用user32.SetParentWinAPI函数强制将窗体嵌入到向导中。这里是一段代码。

C＃：

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脚本：

[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 '[email protected] 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;