You've just solved my problem, so by way of thanks I'll make your life easier. You don't have to go through the agonies of C++ to implement GetHostInfo, you can do it in a method of your winform, all you need is the interfaces. I have included at the end of this posting my complete interfaces file that I partly wrote myself and mostly pillaged from the efforts of others. Alas their names are not in the code. It never occurred to me that I might be the one providing help, and I rewrote it to improve the coherence of style, but they were many and if any of you recognise your own work then tell me and I'll rectify the omission of your credit.
These interfaces will put you in a position to seriously yank the chain of MSHTML. For example once you have the interface declared correctly it is a piece of cake to return any C# object as the result of IDocHostUIHandler.GetExternal() which is how I bind events in generated UI back to event handlers implemented in C# in the host form.
You're quite right - there's not a single comment in the whole damn thing. I wrote it for me, not for you. And all of these interfaces are completely documented in this Microsoft tutorial on the subject.[^]
<button onclick="window.external.AddNew('tableX')">Add New X</button>
using System;
using System.Windows.Forms;
using mshtml;
using SHDocVw;
using System.Runtime.InteropServices;
namespace BrowserCustomisation {
#region IDocHostUIHandler
public enum DOCHOSTUITYPE {
DOCHOSTUITYPE_BROWSE = 0,
DOCHOSTUITYPE_AUTHOR = 1
}
public enum DOCHOSTUIDBLCLK {
DOCHOSTUIDBLCLK_DEFAULT = 0,
DOCHOSTUIDBLCLK_SHOWPROPERTIES = 1,
DOCHOSTUIDBLCLK_SHOWCODE = 2
}
public enum DOCHOSTUIFLAG {
DOCHOSTUIFLAG_DIALOG = 0x00000001,
DOCHOSTUIFLAG_DISABLE_HELP_MENU = 0x00000002,
DOCHOSTUIFLAG_NO3DBORDER = 0x00000004,
DOCHOSTUIFLAG_SCROLL_NO = 0x00000008,
DOCHOSTUIFLAG_DISABLE_SCRIPT_INACTIVE = 0x00000010,
DOCHOSTUIFLAG_OPENNEWWIN = 0x00000020,
DOCHOSTUIFLAG_DISABLE_OFFSCREEN = 0x00000040,
DOCHOSTUIFLAG_FLAT_SCROLLBAR = 0x00000080,
DOCHOSTUIFLAG_DIV_BLOCKDEFAULT = 0x00000100,
DOCHOSTUIFLAG_ACTIVATE_CLIENTHIT_ONLY = 0x00000200,
DOCHOSTUIFLAG_OVERRIDEBEHAVIORFACTORY = 0x00000400,
DOCHOSTUIFLAG_CODEPAGELINKEDFONTS = 0x00000800,
DOCHOSTUIFLAG_URL_ENCODING_DISABLE_UTF8 = 0x00001000,
DOCHOSTUIFLAG_URL_ENCODING_ENABLE_UTF8 = 0x00002000,
DOCHOSTUIFLAG_ENABLE_FORMS_AUTOCOMPLETE = 0x00004000,
DOCHOSTUIFLAG_ENABLE_INPLACE_NAVIGATION = 0x00010000,
DOCHOSTUIFLAG_IME_ENABLE_RECONVERSION = 0x00020000,
DOCHOSTUIFLAG_THEME = 0x00040000,
DOCHOSTUIFLAG_NOTHEME = 0x00080000,
DOCHOSTUIFLAG_NOPICS = 0x00100000,
DOCHOSTUIFLAG_NO3DOUTERBORDER = 0x00200000,
DOCHOSTUIFLAG_DELEGATESIDOFDISPATCH = 0x00400000
}
[ StructLayout( LayoutKind.Sequential )]
public struct DOCHOSTUIINFO {
public uint cbSize;
public uint dwFlags;
public uint dwDoubleClick;
[MarshalAs(UnmanagedType.BStr)] public string pchHostCss;
[MarshalAs(UnmanagedType.BStr)] public string pchHostNS;
}
[StructLayout( LayoutKind.Sequential )]
public struct tagMSG {
public IntPtr hwnd;
public uint message;
public uint wParam;
public int lParam;
public uint time;
public tagPOINT pt;
}
[ComImport(),
InterfaceType(ComInterfaceType.InterfaceIsIUnknown),
GuidAttribute("bd3f23c0-d43e-11cf-893b-00aa00bdce1a")]
public interface IDocHostUIHandler {
[PreserveSig]
uint ShowContextMenu(uint dwID, ref tagPOINT ppt,
[MarshalAs(UnmanagedType.IUnknown)] object pcmdtReserved,
[MarshalAs(UnmanagedType.IDispatch)] object pdispReserved);
void GetHostInfo(ref DOCHOSTUIINFO pInfo);
void ShowUI(uint dwID, ref object pActiveObject, ref object pCommandTarget, ref object pFrame, ref object pDoc);
void HideUI();
void UpdateUI();
void EnableModeless(int fEnable);
void OnDocWindowActivate(int fActivate);
void OnFrameWindowActivate(int fActivate);
void ResizeBorder(ref tagRECT prcBorder, int pUIWindow, int fRameWindow);
[PreserveSig]
uint TranslateAccelerator(ref tagMSG lpMsg, ref Guid pguidCmdGroup, uint nCmdID);
void GetOptionKeyPath([MarshalAs(UnmanagedType.BStr)] ref string pchKey, uint dw);
object GetDropTarget(ref object pDropTarget);
[PreserveSig]
void GetExternal([MarshalAs(UnmanagedType.IDispatch)] out object ppDispatch);
[PreserveSig]
uint TranslateUrl(uint dwTranslate,
[MarshalAs(UnmanagedType.BStr)] string pchURLIn,
[MarshalAs(UnmanagedType.BStr)] ref string ppchURLOut);
IDataObject FilterDataObject(IDataObject pDO);
}
[ComImport(),
GuidAttribute("3050f6d0-98b5-11cf-bb82-00aa00bdce0b")]
public interface IDocHostUIHandler2: IDocHostUIHandler {
void GetOverrideKeyPath([MarshalAs(UnmanagedType.BStr)] ref string pchKey, uint dw);
}
#endregion
#region IDocHostShowUI
[ComImport,
Guid("C4D244B0-D43E-11CF-893B-00AA00BDCE1A"),
InterfaceType(ComInterfaceType.InterfaceIsIUnknown) ]
public interface IDocHostShowUI {
[PreserveSig]
uint ShowMessage(IntPtr hwnd,
[MarshalAs(UnmanagedType.BStr)] string lpstrText,
[MarshalAs(UnmanagedType.BStr)] string lpstrCaption,
uint dwType,
[MarshalAs(UnmanagedType.BStr)] string lpstrHelpFile,
uint dwHelpContext,
out int lpResult);
[PreserveSig]
uint ShowHelp(IntPtr hwnd, [MarshalAs(UnmanagedType.BStr)] string pszHelpFile,
uint uCommand, uint dwData,
tagPOINT ptMouse,
[MarshalAs(UnmanagedType.IDispatch)] object pDispatchObjectHit);
}
#endregion
#region IOleClientSite
[ComImport,
Guid("00000118-0000-0000-C000-000000000046"),
InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IOleClientSite {
void SaveObject();
void GetMoniker(uint dwAssign, uint dwWhichMoniker, ref object ppmk);
void GetContainer(ref object ppContainer);
void ShowObject();
void OnShowWindow(bool fShow);
void RequestNewObjectLayout();
}
#endregion
#region IOleObject
[ComImport,
Guid("00000112-0000-0000-C000-000000000046"),
InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IOleObject {
void SetClientSite(IOleClientSite pClientSite);
void GetClientSite(ref IOleClientSite ppClientSite);
void SetHostNames(object szContainerApp, object szContainerObj);
void Close(uint dwSaveOption);
void SetMoniker(uint dwWhichMoniker, object pmk);
void GetMoniker(uint dwAssign, uint dwWhichMoniker, object ppmk);
void InitFromData(IDataObject pDataObject, bool fCreation, uint dwReserved);
void GetClipboardData(uint dwReserved, ref IDataObject ppDataObject);
void DoVerb(uint iVerb, uint lpmsg, object pActiveSite, uint lindex, uint hwndParent, uint lprcPosRect);
void EnumVerbs(ref object ppEnumOleVerb);
void Update();
void IsUpToDate();
void GetUserClassID(uint pClsid);
void GetUserType(uint dwFormOfType, uint pszUserType);
void SetExtent(uint dwDrawAspect, uint psizel);
void GetExtent(uint dwDrawAspect, uint psizel);
void Advise(object pAdvSink, uint pdwConnection);
void Unadvise(uint dwConnection);
void EnumAdvise(ref object ppenumAdvise);
void GetMiscStatus(uint dwAspect,uint pdwStatus);
void SetColorScheme(object pLogpal);
};
#endregion
}
Stop asking about my world domination plan. You'll find out when the time comes.
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