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.NET Forum / Languages / Managed C++ / May 2004How to use unmanaged codes in managed ones.
Hello Esteemed Developers I face problems using some managed codes in unmanaged ones and vice versa. For exampla I frequently took the following error message. That is C2440: 'type cast' : cannot convert from 'sockaddr_in __gc*' to 'sockaddr* O C2664: 'WSAStartup' : cannot convert parameter 2 from 'WSADATA __gc*' to 'LPWSADATA I noticed that my problem is converting managed types/codes to unmanged types/codes. I found some web pages about conversion. But those examples or explanations seems to me complex. Marshal is a tecnique to do this conversion If you kindly forward me to a site, which explains this subject, is also prefereable I would like to thank you in advance foe your sincere considerations and guidances Alper, > Hello Esteemed Developers, > I face problems using some managed codes in unmanaged ones and vice versa. For exampla I frequently took the following error message. That is: [quoted text clipped - 3 lines] > > I noticed that my problem is converting managed types/codes to unmanged types/codes. I found some web pages about conversion. But those examples or explanations seems to me complex. Marshal is a tecnique to do this conversion. > If you kindly forward me to a site, which explains this subject, is also prefereable. > > I would like to thank you in advance foe your sincere considerations and guidances No need to marshal. Your problem is that you need to pin the objects in order to be able to pass them to unmanaged code. Look for __pin in the documentation.,  SignatureTomas Restrepo tomasr@mvps.org Managed pointer as a member to an unmanaged class, or a global http://msdn.microsoft.com/library/en-us/vcmxspec/html/vcManagedExtensionsSpec_16_3.as Managed pointer that can be converted to an unmanaged pointer http://msdn.microsoft.com/library/en-us/vcmex/html/vclrf__pin.asp Thank you MCCOYN Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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