why create webbrowser using CoCreateInstance in c# not working?

Trips · Nov 25, 2010

hi, guys,
I just try to create webbrowser using the very original form to avoid the well-known memory leak of c# webbrower control. But I cant make my code working. First, I initialed OLE, and then create webbrowser, just the same
steps like http://msdn.microsoft.com/en-us/library/aa770041(v=VS.85).aspx http://msdn.microsoft.com/en-us/library/aa770041(v=VS.85).aspx tells us. But when I try to navigator google.com, error occured, which is:
HRESULT:0x80004005 
(unknown error).
Could anyone be kind to help me ?

here is my main code:
// initial ole 
OleInitialize(IntPtr.Zero);
//Create a new WB, throws exception if fails 
Type webbrowsertype = Type.GetTypeFromCLSID(new Guid("8856F961-340A-11D0-A96B-00C04FD705A2"), true); 
//Using Activator inplace of CoCreateInstance, returns IUnknown 
object gwb = System.Activator.CreateInstance(webbrowsertype);
// set client site 
IOleObject ioo = (IOleObject)gwb; 
ioo.SetClientSite(this);
ioo.SetHostNames("GWebBrowser", string.Empty);
//Get the IOleInPlaceObject 
IOleInPlaceObject ioip = (IOleInPlaceObject)gwb; 
tagRECT trect1 = new tagRECT(0, 0, 300, 300); 
tagRECT trect2 = new tagRECT(0, 0, 300, 300); 
//Set WB rects 
ioip.SetObjectRects(ref trect1, ref trect2);
tagRECT rect = new tagRECT(0, 0, 300, 300); 
tagMSG nullmsg = new tagMSG(); 
ioo.DoVerb(-1, ref nullmsg, this, 0, this.Handle, ref rect);
IWebBrowser2 wb = (IWebBrowser2)gwb; 
object nullObj = null; 
 
// this line will be ERROR! HRESULT:0x80004005
 
wb.Navigate(" http://www.google.com www.google.com ", ref nullObj, ref nullObj, ref nullObj, ref nullObj);
I implement IOleClientSite like this:
int IOleClientSite.SaveObject() 
{ 
return unchecked((int)0x80004001); 
//throw new Exception("The method or operation is not implemented."); 
}
int IOleClientSite.GetMoniker(uint dwAssign, uint dwWhichMoniker, out IMoniker ppmk) 
{ 
ppmk = null; 
return unchecked((int)0x80004001); 
}
int IOleClientSite.GetContainer(out IOleContainer ppContainer) 
{ 
ppContainer = null; 
return unchecked((int)0x80004001); 
}
int IOleClientSite.ShowObject() 
{ 
return 0; 
}
int IOleClientSite.OnShowWindow(bool fShow) 
{ 
return unchecked((int)0x80004001); 
}
int IOleClientSite.RequestNewObjectLayout() 
{ 
return unchecked((int)0x80004001); 
}
And, here is the interface define:
namespace WindowsFormsApplication1 
{ 
[ComImport, 
Guid("D30C1661-CDAF-11D0-8A3E-00C04FC9E26E"), 
InterfaceType(ComInterfaceType.InterfaceIsIDispatch), 
SuppressUnmanagedCodeSecurity] 
public interface IWebBrowser2 
{ 
[DispId(100)] 
void GoBack(); 
[DispId(0x65)] 
void GoForward(); 
[DispId(0x66)] 
void GoHome(); 
[DispId(0x67)] 
void GoSearch(); 
[DispId(0x68)] 
void Navigate([MarshalAs(UnmanagedType.BStr)] string URL, [In] ref object Flags, [In] ref object TargetFrameName, [In] ref object PostData, [In] ref object Headers); 
[DispId(-550)] 
void Refresh(); 
[DispId(0x69)] 
void Refresh2([In] ref object Level); 
[DispId(0x6a)] 
void Stop(); 
[DispId(300)] 
void Quit(); 
[DispId(0x12d)] 
void ClientToWindow([In, Out] ref int pcx, [In, Out] ref int pcy); 
[DispId(0x12e)] 
void PutProperty([MarshalAs(UnmanagedType.BStr)] string Property, object vtValue); 
[DispId(0x12f)] 
object GetProperty([MarshalAs(UnmanagedType.BStr)] string Property); 
[DispId(500)] 
void Navigate2([In] ref object URL, [In] ref object Flags, [In] ref object TargetFrameName, [In] ref object PostData, [In] ref object Headers); 
[DispId(0x1f5)] 
OLECMDF QueryStatusWB(OLECMDID cmdID); 
[DispId(0x1f6)] 
void ExecWB(OLECMDID cmdID, OLECMDEXECOPT cmdexecopt, [In] ref object pvaIn, [In, Out] ref object pvaOut); 
[DispId(0x1f7)] 
void ShowBrowserBar([In] ref object pvaClsid, [In] ref object pvarShow, [In] ref object pvarSize); 
bool AddressBar { [return: MarshalAs(UnmanagedType.VariantBool)] [DispId(0x22b)] get; [DispId(0x22b)] set; } 
object Application { [return: MarshalAs(UnmanagedType.IDispatch)] [DispId(200)] get; } 
bool Busy { [return: MarshalAs(UnmanagedType.VariantBool)] [DispId(0xd4)] get; } 
object Container { [return: MarshalAs(UnmanagedType.IDispatch)] [DispId(0xca)] get; } 
object Document { [return: MarshalAs(UnmanagedType.IDispatch)] [DispId(0xcb)] get; } 
string FullName { [return: MarshalAs(UnmanagedType.BStr)] [DispId(400)] get; } 
bool FullScreen { [return: MarshalAs(UnmanagedType.VariantBool)] [DispId(0x197)] get; [DispId(0x197)] set; } 
int Height { [DispId(0xd1)] get; [DispId(0xd1)] set; } 
int HWND { [DispId(-515)] get; } 
int Left { [DispId(0xce)] get; [DispId(0xce)] set; } 
string LocationName { [return: MarshalAs(UnmanagedType.BStr)] [DispId(210)] get; } 
string LocationURL { [return: MarshalAs(UnmanagedType.BStr)] [DispId(0xd3)] get; } 
bool MenuBar { [return: MarshalAs(UnmanagedType.VariantBool)] [DispId(0x196)] get; [DispId(0x196)] set; } 
string Name { [return: MarshalAs(UnmanagedType.BStr)] [DispId(0)] get; } 
bool Offline { [return: MarshalAs(UnmanagedType.VariantBool)] [DispId(550)] get; [DispId(550)] set; } 
object Parent { [return: MarshalAs(UnmanagedType.IDispatch)] [DispId(0xc9)] get; } 
string Path { [return: MarshalAs(UnmanagedType.BStr)] [DispId(0x191)] get; } 
tagREADYSTATE ReadyState { [DispId(-525)] get; } 
bool RegisterAsBrowser { [return: MarshalAs(UnmanagedType.VariantBool)] [DispId(0x228)] get; [DispId(0x228)] set; } 
bool RegisterAsDropTarget { [return: MarshalAs(UnmanagedType.VariantBool)] [DispId(0x229)] get; [DispId(0x229)] set; } 
bool Resizable { [return: MarshalAs(UnmanagedType.VariantBool)] [DispId(0x22c)] get; [DispId(0x22c)] set; } 
bool Silent { [return: MarshalAs(UnmanagedType.VariantBool)] [DispId(0x227)] get; [DispId(0x227)] set; } 
bool StatusBar { [return: MarshalAs(UnmanagedType.VariantBool)] [DispId(0x193)] get; [DispId(0x193)] set; } 
string StatusText { [return: MarshalAs(UnmanagedType.BStr)] [DispId(0x194)] get; [DispId(0x194)] set; } 
bool TheaterMode { [return: MarshalAs(UnmanagedType.VariantBool)] [DispId(0x22a)] get; [DispId(0x22a)] set; } 
int ToolBar { [DispId(0x195)] get; [DispId(0x195)] set; } 
int Top { [DispId(0xcf)] get; [DispId(0xcf)] set; } 
bool TopLevelContainer { [return: MarshalAs(UnmanagedType.VariantBool)] [DispId(0xcc)] get; } 
string Type { [return: MarshalAs(UnmanagedType.BStr)] [DispId(0xcd)] get; } 
bool Visible { [return: MarshalAs(UnmanagedType.VariantBool)] [DispId(0x192)] get; [DispId(0x192)] set; } 
int Width { [DispId(0xd0)] get; [DispId(0xd0)] set; } 
}
[ComImport, ComVisible(true)] 
[Guid("00000112-0000-0000-C000-000000000046")] 
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] 
public interface IOleObject 
{ 
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int SetClientSite( 
[In, MarshalAs(UnmanagedType.Interface)] IOleClientSite pClientSite);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int GetClientSite( 
[Out, MarshalAs(UnmanagedType.Interface)] out IOleClientSite site);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int SetHostNames( 
[In, MarshalAs(UnmanagedType.LPWStr)] string szContainerApp, 
[In, MarshalAs(UnmanagedType.LPWStr)] string szContainerObj);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int Close([In, MarshalAs(UnmanagedType.U4)] uint dwSaveOption);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int SetMoniker( 
[In, MarshalAs(UnmanagedType.U4)] int dwWhichMoniker, 
[In, MarshalAs(UnmanagedType.Interface)] IMoniker pmk);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int GetMoniker( 
[In, MarshalAs(UnmanagedType.U4)] uint dwAssign, 
[In, MarshalAs(UnmanagedType.U4)] uint dwWhichMoniker, 
[Out, MarshalAs(UnmanagedType.Interface)] out IMoniker moniker);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int InitFromData( 
[In, MarshalAs(UnmanagedType.Interface)] System.Runtime.InteropServices.ComTypes.IDataObject pDataObject, 
[In, MarshalAs(UnmanagedType.Bool)] bool fCreation, 
[In, MarshalAs(UnmanagedType.U4)] uint dwReserved);
int GetClipboardData( 
[In, MarshalAs(UnmanagedType.U4)] uint dwReserved, 
[Out, MarshalAs(UnmanagedType.Interface)] out System.Runtime.InteropServices.ComTypes.IDataObject data);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int DoVerb( 
[In, MarshalAs(UnmanagedType.I4)] int iVerb, 
[In, MarshalAs(UnmanagedType.Struct)] ref tagMSG lpmsg, 
//[In] IntPtr lpmsg, 
[In, MarshalAs(UnmanagedType.Interface)] IOleClientSite pActiveSite, 
//[In] IntPtr pActiveSite, 
[In, MarshalAs(UnmanagedType.I4)] int lindex, 
[In] IntPtr hwndParent, 
[In, MarshalAs(UnmanagedType.Struct)] ref tagRECT lprcPosRect);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int EnumVerbs([Out, MarshalAs(UnmanagedType.Interface)] out Object e); 
//int EnumVerbs(out IEnumOLEVERB e);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int OleUpdate();
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int IsUpToDate();
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int GetUserClassID([In, Out] ref Guid pClsid);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int GetUserType( 
[In, MarshalAs(UnmanagedType.U4)] uint dwFormOfType, 
[Out, MarshalAs(UnmanagedType.LPWStr)] out string userType);
//[return: MarshalAs(UnmanagedType.I4)] 
//[PreserveSig] 
//int SetExtent( 
// [In, MarshalAs(UnmanagedType.U4)] uint dwDrawAspect, 
// [In, MarshalAs(UnmanagedType.Struct)] ref tagSIZEL pSizel);
//[return: MarshalAs(UnmanagedType.I4)] 
//[PreserveSig] 
//int GetExtent( 
// [In, MarshalAs(UnmanagedType.U4)] uint dwDrawAspect, 
// [In, Out, MarshalAs(UnmanagedType.Struct)] ref tagSIZEL pSizel);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int Advise( 
[In, MarshalAs(UnmanagedType.Interface)] IAdviseSink pAdvSink, 
out int cookie);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int Unadvise( 
[In, MarshalAs(UnmanagedType.U4)] uint dwConnection);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int EnumAdvise(out IEnumSTATDATA e);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int GetMiscStatus( 
[In, MarshalAs(UnmanagedType.U4)] uint dwAspect, 
out int misc);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int SetColorScheme([In, MarshalAs(UnmanagedType.Struct)] ref object pLogpal); 
}
[ComVisible(true), StructLayout(LayoutKind.Sequential)] 
public struct tagMSG 
{ 
public IntPtr hwnd; 
[MarshalAs(UnmanagedType.I4)] 
public int message; 
public IntPtr wParam; 
public IntPtr lParam; 
[MarshalAs(UnmanagedType.I4)] 
public int time; 
// pt was a by-value POINT structure 
[MarshalAs(UnmanagedType.I4)] 
public int pt_x; 
[MarshalAs(UnmanagedType.I4)] 
public int pt_y; 
//public tagPOINT pt; 
}
[ComVisible(true), StructLayout(LayoutKind.Sequential)] 
public struct tagRECT 
{ 
[MarshalAs(UnmanagedType.I4)] 
public int Left; 
[MarshalAs(UnmanagedType.I4)] 
public int Top; 
[MarshalAs(UnmanagedType.I4)] 
public int Right; 
[MarshalAs(UnmanagedType.I4)] 
public int Bottom;
public tagRECT(int left_, int top_, int right_, int bottom_) 
{ 
Left = left_; 
Top = top_; 
Right = right_; 
Bottom = bottom_; 
} 
}
[ComImport, ComVisible(true)] 
[Guid("00000118-0000-0000-C000-000000000046")] 
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] 
public interface IOleClientSite 
{ 
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int SaveObject();
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int GetMoniker( 
[In, MarshalAs(UnmanagedType.U4)] uint dwAssign, 
[In, MarshalAs(UnmanagedType.U4)] uint dwWhichMoniker, 
[Out, MarshalAs(UnmanagedType.Interface)] out IMoniker ppmk);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int GetContainer( 
[Out, MarshalAs(UnmanagedType.Interface)] out IOleContainer ppContainer);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int ShowObject();
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int OnShowWindow([In, MarshalAs(UnmanagedType.Bool)] bool fShow);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int RequestNewObjectLayout(); 
}
[ComImport(), ComVisible(true), 
Guid("0000011B-0000-0000-C000-000000000046"), 
InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)] 
public interface IOleContainer 
{ 
//IParseDisplayName 
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int ParseDisplayName( 
[In, MarshalAs(UnmanagedType.Interface)] object pbc, 
[In, MarshalAs(UnmanagedType.BStr)] string pszDisplayName, 
[Out, MarshalAs(UnmanagedType.LPArray)] int[] pchEaten, 
[Out, MarshalAs(UnmanagedType.LPArray)] object[] ppmkOut);
//IOleContainer 
//[return: MarshalAs(UnmanagedType.I4)] 
//[PreserveSig] 
//int EnumObjects( 
// [In, MarshalAs(UnmanagedType.U4)] tagOLECONTF grfFlags, 
// out IEnumUnknown ppenum);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int LockContainer( 
[In, MarshalAs(UnmanagedType.Bool)] Boolean fLock); 
}
public enum tagOLECONTF 
{ 
OLECONTF_EMBEDDINGS = 1, 
OLECONTF_LINKS = 2, 
OLECONTF_OTHERS = 4, 
OLECONTF_ONLYUSER = 8, 
OLECONTF_ONLYIFRUNNING = 16 
} 
[ComVisible(true), ComImport(), 
Guid("00000113-0000-0000-C000-000000000046"), 
InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)] 
public interface IOleInPlaceObject 
{ 
//IOleWindow 
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int GetWindow([In, Out] ref IntPtr phwnd);
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int ContextSensitiveHelp([In, MarshalAs(UnmanagedType.Bool)] bool 
fEnterMode);
//IOleInPlaceObject 
void InPlaceDeactivate();
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int UIDeactivate();
[return: MarshalAs(UnmanagedType.I4)] 
[PreserveSig] 
int SetObjectRects( 
[In, MarshalAs(UnmanagedType.Struct)] ref tagRECT lprcPosRect, 
[In, MarshalAs(UnmanagedType.Struct)] ref tagRECT lprcClipRect);
void ReactivateAndUndo(); 
}
public enum tagREADYSTATE 
{ 
READYSTATE_UNINITIALIZED = 0, 
READYSTATE_LOADING = 1, 
READYSTATE_LOADED = 2, 
READYSTATE_INTERACTIVE = 3, 
READYSTATE_COMPLETE = 4 
} 
public enum OLECMDF 
{ 
OLECMDF_SUPPORTED = 1, 
OLECMDF_ENABLED = 2, 
OLECMDF_LATCHED = 4, 
OLECMDF_NINCHED = 8, 
OLECMDF_INVISIBLE = 16, 
OLECMDF_DEFHIDEONCTXTMENU = 32 
} 
public enum OLECMDID 
{ 
OLECMDID_OPEN = 1, 
OLECMDID_NEW = 2, 
OLECMDID_SAVE = 3, 
OLECMDID_SAVEAS = 4, 
OLECMDID_SAVECOPYAS = 5, 
OLECMDID_PRINT = 6, 
OLECMDID_PRINTPREVIEW = 7, 
OLECMDID_PAGESETUP = 8, 
OLECMDID_SPELL = 9, 
OLECMDID_PROPERTIES = 10, 
OLECMDID_CUT = 11, 
OLECMDID_COPY = 12, 
OLECMDID_PASTE = 13, 
OLECMDID_PASTESPECIAL = 14, 
OLECMDID_UNDO = 15, 
OLECMDID_REDO = 16, 
OLECMDID_SELECTALL = 17, 
OLECMDID_CLEARSELECTION = 18, 
OLECMDID_ZOOM = 19, 
OLECMDID_GETZOOMRANGE = 20, 
OLECMDID_UPDATECOMMANDS = 21, 
OLECMDID_REFRESH = 22, 
OLECMDID_STOP = 23, 
OLECMDID_HIDETOOLBARS = 24, 
OLECMDID_SETPROGRESSMAX = 25, 
OLECMDID_SETPROGRESSPOS = 26, 
OLECMDID_SETPROGRESSTEXT = 27, 
OLECMDID_SETTITLE = 28, 
OLECMDID_SETDOWNLOADSTATE = 29, 
OLECMDID_STOPDOWNLOAD = 30, 
OLECMDID_ONTOOLBARACTIVATED = 31, 
OLECMDID_FIND = 32, 
OLECMDID_DELETE = 33, 
OLECMDID_HTTPEQUIV = 34, 
OLECMDID_HTTPEQUIV_DONE = 35, 
OLECMDID_ENABLE_INTERACTION = 36, 
OLECMDID_ONUNLOAD = 37, 
OLECMDID_PROPERTYBAG2 = 38, 
OLECMDID_PREREFRESH = 39, 
OLECMDID_SHOWSCRIPTERROR = 40, 
OLECMDID_SHOWMESSAGE = 41, 
OLECMDID_SHOWFIND = 42, 
OLECMDID_SHOWPAGESETUP = 43, 
OLECMDID_SHOWPRINT = 44, 
OLECMDID_CLOSE = 45, 
OLECMDID_ALLOWUILESSSAVEAS = 46, 
OLECMDID_DONTDOWNLOADCSS = 47, 
OLECMDID_UPDATEPAGESTATUS = 48, 
OLECMDID_PRINT2 = 49, 
OLECMDID_PRINTPREVIEW2 = 50, 
OLECMDID_SETPRINTTEMPLATE = 51, 
OLECMDID_GETPRINTTEMPLATE = 52, 
OLECMDID_PAGEACTIONBLOCKED = 55, 
OLECMDID_PAGEACTIONUIQUERY = 56, 
OLECMDID_FOCUSVIEWCONTROLS = 57, 
OLECMDID_FOCUSVIEWCONTROLSQUERY = 58, 
OLECMDID_SHOWPAGEACTIONMENU = 59, 
OLECMDID_ADDTRAVELENTRY = 60, 
OLECMDID_UPDATETRAVELENTRY = 61, 
OLECMDID_UPDATEBACKFORWARDSTATE = 62, 
OLECMDID_OPTICAL_ZOOM = 63, 
OLECMDID_OPTICAL_GETZOOMRANGE = 64, 
OLECMDID_WINDOWSTATECHANGED = 65, 
//OLECMDID_IE7_SHOWSCRIPTERROR = 69 
} 
public enum OLECMDEXECOPT 
{ 
OLECMDEXECOPT_DODEFAULT = 0, 
OLECMDEXECOPT_PROMPTUSER = 1, 
OLECMDEXECOPT_DONTPROMPTUSER = 2, 
OLECMDEXECOPT_SHOWHELP = 3 
} 
}

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why create webbrowser using CoCreateInstance in c# not working?

Trips

Well-known member

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