Solved

How can i use a c++ compiled dll on c#?

Posted on 2008-10-13
4
283 Views
Last Modified: 2013-11-20
Hello,

Ive compiled a dll and i need it to use on c#, how can i do that?

Im ataching dll code.

THanks
#include "stdafx.h" // Required Precompiled Header
#include "unknwn.h" // IUnknown Interface
#include "Exdisp.h" // IWebBrowser2 Interface
#include "stdlib.h" // x
#include "mshtml.h" // MSHTML
 
BOOL APIENTRY getFrameDocumentById( HANDLE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved)
{
return TRUE;
}
 
extern "C" __declspec(dllexport) HRESULT CALLBACK GetFrameDocuments(long cbAddress,
IWebBrowser2* pTopWebBrowser) {
 
//
// ----- Initialize Variables ---
//
int code = 0;
HRESULT hr = 0;
UINT i = 0;
 
// Validate WebBrowser Argument (!NULL, top win, !busy, etc.)
if (pTopWebBrowser != NULL) {
 
// Get pTopWebBrowser's Document IDispatch Interface
code = 1;
IDispatch* pTopDocument;
hr = pTopWebBrowser->get_Document(&pTopDocument);
 
if (pTopDocument != NULL) {
 
// Get pTopDocument's Container OLE Interface
code = 2;
IOleContainer* pContainer;
hr = pTopDocument->QueryInterface(IID_IOleContainer, (void**)&pContainer);
pTopDocument->Release();
 
if (SUCCEEDED(hr)) {
 
// Get Container's Embeddings Enumerator
code = 3;
IEnumUnknown* pEnumerator;
hr = pContainer->EnumObjects(OLECONTF_EMBEDDINGS, &pEnumerator);
pContainer->Release();
 
if (SUCCEEDED(hr)) {
 
// Iterate Container's Embeddings
IUnknown* pUnk;
ULONG uFetched;
 
for (i = 0; S_OK == pEnumerator->Next(1, &pUnk, &uFetched); i++) {
 
 
// Get Embedded's IWebBrowser2 Interface
code = 4;
IWebBrowser2* pFrameWebBrowser;
hr = pUnk->QueryInterface(IID_IWebBrowser2, (void**)&pFrameWebBrowser);
 
if (SUCCEEDED(hr)) {
 
// Get Embedded's IHTMLElement Interface
code = 5;
IHTMLElement* pFrameIHTMLElement;
hr = pUnk->QueryInterface(IID_IHTMLElement, (void**)&pFrameIHTMLElement);
pFrameIHTMLElement->Release();
 
if (SUCCEEDED(hr)) {
 
// Get IHTMLElement's Document IDispatch Interface
code = 6;
IDispatch* pFrameDocument;
pFrameWebBrowser->get_Document(&pFrameDocument);
pFrameWebBrowser->Release();
 
if (pFrameDocument != NULL ) {
 
// Get Frame's Docuument IDispatch Interface
code = 7;
IHTMLDocument2* pFrameIHTMLDocument2;
hr = pFrameDocument->QueryInterface(IID_IHTMLDocument2, (void**)&pFrameIHTMLDocument2);
pFrameDocument->Release();
 
if (SUCCEEDED(hr)) {
 
typedef void (__stdcall *FUNCPTR)(
IWebBrowser2 *pWebBrowser,
IHTMLDocument2 *pFrameDocument,
BSTR pbstr);
 
FUNCPTR vbFunc = (FUNCPTR)cbAddress;
 
wchar_t wchar[] = L"Test string";
vbFunc(pTopWebBrowser, pFrameIHTMLDocument2, SysAllocString(wchar));
 
pFrameIHTMLDocument2->Release();
 
} // pFrameIHTMLDocument2
} // pFrameDocument
} // pFrameIHTMLElement
} // pFrameWebBrowser
pUnk->Release();
} // for pEnumerator
} // pEnumerator
pEnumerator->Release();
} // pContainer
} // pTopDocument
} // Vaidate pTopWebBrowser
 
 
//return 0;
if (hr == 0) {
return i + 9900; // testing
}
else {
return code + 8800;
}
 
} // GetFrameWindows
 
 
 
 
Def File:
; Cross.def : Declares the module parameters for the DLL.
 
LIBRARY      "Cross"
 
EXPORTS
    ; Explicit exports can go here
	GetFrameDocuments @1

Open in new window

0
Comment
Question by:epagos7
4 Comments
 
LVL 9

Accepted Solution

by:
Misbah earned 500 total points
ID: 22705509
you need to declear the functions/methods you made in cpp in a c# class
and then you can use this c# class (wrapper for cpp) as any normal c# class.

see this example:

http://msdn.microsoft.com/en-us/magazine/cc301501.aspx
0
 

Author Comment

by:epagos7
ID: 22705637
mmm,

any help how can i declare and use the c++ func:

extern "C" __declspec(dllexport) HRESULT CALLBACK GetFrameDocuments(long cbAddress,
IWebBrowser2* pTopWebBrowser) {

?

Also i do not have HResult type on c#
0
 
LVL 19

Expert Comment

by:LordOfPorts
ID: 22706598
System.Long should correspond to HRESULT, I am however not quite certain regarding the IWebBrowser2 interface however this thread might be helpful http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=2463777&SiteID=1 
0

Featured Post

ScreenConnect 6.0 Free Trial

Want empowering updates? You're in the right place! Discover new features in ScreenConnect 6.0, based on partner feedback, to keep you business operating smoothly and optimally (the way it should be). Explore all of the extras and enhancements for yourself!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article introduced a TextBox that supports transparent background.   Introduction TextBox is the most widely used control component in GUI design. Most GUI controls do not support transparent background and more or less do not have the…
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
The viewer will be introduced to the technique of using vectors in C++. The video will cover how to define a vector, store values in the vector and retrieve data from the values stored in the vector.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.

809 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question