mfc - Use a C++/CLI DLL using afxwinforms.h as Reference of another C++/CLI DLL also using afxwinforms.h -


in visual c++ 2010 added reference c++/cli dll (controlwrapper.dll) c++/cli dll (clilibrary.dll).

both including afxwinforms.h in stdafx.h.

when try compile these errors:

error c2011: 'microsoft::visualc::mfc::cwin32window' : 'class' type redefinition error c2011: 'microsoft::visualc::mfc::cwinformseventshelper' : 'class' type redefinition

if turn of option reference assembly output , add #using "clilibrary.dll" using .cpp file following warnings:

1>controlwrapper.dll : warning c4944: 'cwin32window' : cannot import symbol 'c:\dev\trunk\clilibrary.dll': 'microsoft::visualc::mfc::cwin32window' exists in current scope 1>     c:\program files (x86)\microsoft visual studio 10.0\vc\atlmfc\include\afxwinforms.h(83) : see declaration of 'microsoft::visualc::mfc::cwin32window' 1>          diagnostic occurred while importing type 'microsoft.visualc.mfc.cwin32window' assembly 'clilibrary, version=1.0.4843.17337, culture=neutral, publickeytoken=null'. 1>controlwrapper.dll : warning c4944: 'cwinformseventshelper' : cannot import symbol 'c:\dev\sfirm\trunk\sfclrlib\debug\sfclrlib.dll': 'microsoft::visualc::mfc::cwinformseventshelper' exists in current scope 1>          c:\program files (x86)\microsoft visual studio 10.0\vc\atlmfc\include\afxwinforms.h(122) : see declaration of 'microsoft::visualc::mfc::cwinformseventshelper' 1>          diagnostic occurred while importing type 'microsoft.visualc.mfc.cwinformseventshelper' assembly 'clilibrary, version=1.0.4843.17337, culture=neutral, publickeytoken=null'.

how solve error?

well, painful problem. explains why first programmer ever encountered uses this. problem caused declaration in afxwinforms.h:

public ref class cwin32window : public system::windows::forms::iwin32window // etc..

the public keyword killer, adds class manifest of assembly. when reference in project includes header there 2 definitions of class. mix of both native , managed classes in header prevents clean solution.

i think found best solution, using #include, #pragma comment(disable:4944) shutup compiler. including header inside namespace might viable hack, renames namespace of cwin32window, i'd expect trouble when linking mfcm90.lib. restructuring solution , keeping winforms code inside 1 project thing can recommend.


Comments

Post a Comment

Popular posts from this blog

monitor web browser programmatically in Android? -

i've got tricky question here. need users make payment bank (namely barclaycard) in uk. so, have https url , add parameters (such amount pay, order reference, etc) url, start http connection intent.actionview, redirect user browser can enter credit card details on bank's webpage , make payment our account successfully. far ? the code use below (i changed values privacy reasons) problem is, need app when user has completed/failed/cancelled payment. barclaycardautomatically redirects particular url when payment has succeeded, 1 if failed. there no way of knowing when barclaycard payment has succeeded go android app somehow ? button cardbutton = (button) findviewbyid(r.id.card_button); cardbutton.setonclicklistener(new view.onclicklistener() { @override public void onclick(view arg0) { string prehashstring = new string(); string prohashstring = new string(); string shapassphrase = new string(); shapassphrase = "gsvth£h70zkh...
Read more

Shrink a YouTube video to responsive width -

i have youtube video embedded on our website , when shrink screen tablet or phone sizes stops shrinking @ around 560px in width. standard youtube videos or there can add code make go smaller? you can make youtube videos responsive css. wrap iframe in div class of "videowrapper" , apply following styles: .videowrapper { float: none; clear: both; width: 100%; position: relative; padding-bottom: 56.25%; padding-top: 25px; height: 0; } .videowrapper iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; } the .videowrapper div should inside responsive element. padding on .videowrapper necessary keep video collapsing. may have tweak numbers depending upon layout.
Read more

wpf - PdfWriter.GetInstance throws System.NullReferenceException -

i'm trying create pdf document using itextsharp 5.3.4 using following document document = new document(); filestream stm = new filestream(filename, filemode.create); pdfwriter writer = pdfwriter.getinstance(document, stm); i'm getting system.nullreferenceexception following stack trace: system.nullreferenceexception occurred hresult=-2147467261 message=la référence d'objet n'est pas définie à une instance d'un objet. source=itextsharp stacktrace: à itextsharp.text.version.getinstance() innerexception: i've verified neither document nor stm null, , if select "continue" in vs12 document created - exception thrown. updated itextsharp 5.4.0 , it's still occurring. can't find information on anywhere - got ideas? make sure not catching exceptions. nullreferenceexception can 1 caught , handled inside itextsharp, don't care it. fact can continue supports theory. change following setting verify: debug -> exceptions ...
Read more