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Exporting C++ classes without using MFC extension DLL

, 5 Jun 2002
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This article describes the process of exporting regular C++ classes without using MFC extension DLLs
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Introduction

DLLs are a great way of sharing common pieces of code data between applications. When it comes down to exporting C++ classes from DLLs most of us go for MFC extension DLLs where we can use the AFX_EXT_CLASS macro to export an entire class. Unfortunately, MFC is no lean and mean class architecture, which means that distributing MFC extension DLLs mean that you have to include the big MFC runtime not to mention the fact that your DLL can only be linked to MFC applications exclusively. What's the solution then? Enter standard Win32 DLLs.

Details

I couldn't believe my eyes on how easily one can export C++ classes directly from a plain vanilla Win32 DLL. Just make one and insert your classes into the DLL. Now simply put __declspec(dllexport) in between the class keyword and the class name, i.e.

// in your header...

class __declspec(dllexport) CDllTest
{
public:  
  CDllTest(){}
  ~CDllTest(){}

public:
  void SayHello();
};

// in your cpp...

void CDllTest::SayHello()
{
 printf(_T("Hello C++"));
}

That's it! The sample code and project are pretty self explanatory. Enjoy.

License

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About the Author

Tanzim Husain
Web Developer
United States United States
No Biography provided

Comments and Discussions

 
QuestionI got lilnker error LN2019 PinmemberVivek_Mendse10-Nov-11 18:52 
QuestionReally - that simple? PinmemberVaclav_Sal4-Feb-11 8:48 
GeneralUsing dll Pinmembers_t_r_e_a_m_e_r18-Nov-07 1:19 
QuestionHow can I use a class exported from a DLL by using LoadLibrary function Pinmemberzhoujinjun085827-Aug-07 4:22 
AnswerRe: How can I use a class exported from a DLL by using LoadLibrary function Pinmemberafriza2-Dec-08 16:44 
GeneralGreat! Pinmemberdocrob125-Jan-07 17:48 
Generaldelete cuases access violation Pinmembertom cruz18-Aug-05 2:35 
GeneralRe: delete cuases access violation PinmemberIgen19-Mar-09 7:14 
Generalqn PinsussFrom_Nepal6-Jan-05 8:00 
after exporting classes how do I access it's member function from another module by using run time dynamic linking (LoadLibrary, GetProcAddress...)?
GeneralLoad at runtime PinmemberVerifier16-Apr-04 4:30 
GeneralRe: Load at runtime PinmemberThatsAlok20-Apr-06 22:32 
QuestionHow to create DllTest.dll and DllTest.lib in VC7.0 PinmemberSctt H. Chang31-Mar-04 10:11 
AnswerRe: How to create DllTest.dll and DllTest.lib in VC7.0 PinsussAnonymous17-Apr-04 23:26 
Questionis it mean that regular DLL can replace extension DLL every time? Pinmemberdalink6-Mar-04 6:00 
GeneralA slight correction and enhancement PinmemberDavid Pritchard29-May-03 7:31 
Questionhow to insert a class from MFC to C# Pinmembermosgeorge13-Apr-03 3:49 
AnswerRe: how to insert a class from MFC to C# PinmemberTanzim Husain23-Apr-03 20:54 
AnswerRe: how to insert a class from MFC to C# PinmemberTakeru Koushirou27-Jun-04 21:31 
GeneralRe: how to insert a class from MFC to C# Pinmembercharnos13-Aug-04 6:49 
Generalany Info about Proxy DLL (Trojan DLL) Pinmemberbfadi5-Mar-03 10:24 
GeneralRe: any Info about Proxy DLL (Trojan DLL) PinmemberTanzim Husain23-Apr-03 21:14 
GeneralRe: any Info about Proxy DLL (Trojan DLL) PinmembergypsySUN17-Oct-03 18:11 
GeneralRe: any Info about Proxy DLL (Trojan DLL) Pinmemberbfadi18-Oct-03 20:42 
GeneralRe: any Info about Proxy DLL (Trojan DLL) PinmembergypsySUN21-Oct-03 5:27 
GeneralRe: any Info about Proxy DLL (Trojan DLL) Pinmemberbfadi21-Oct-03 19:57 
QuestionIs your linking truly dynamic, or static? PinsussLewis McCarthy20-Sep-02 10:12 
AnswerRe: Is your linking truly dynamic, or static? PinmemberJonte23-Oct-02 3:29 
AnswerRe: Is your linking truly dynamic, or static? PinmemberTakeru Koushirou27-Jun-04 21:39 
AnswerRe: Is your linking truly dynamic, or static? Pinmemberafriza2-Dec-08 16:51 
GeneralMultiple Classes PinmemberGWG11-Jun-02 0:17 
GeneralRe: Multiple Classes PinmemberTanzim Husain23-Apr-03 21:06 
GeneralRe: Multiple Classes Pinmemberbad_source_bios24-Apr-03 10:31 
GeneralRe: Multiple Classes PinsussAnonymous2-May-03 11:43 
GeneralRe: Multiple Classes Pinmemberbad_source_bios2-May-03 12:24 
GeneralTHAAAAANK YOU!! PinmemberRickard Andersson10-Jun-02 7:10 
GeneralRe: THAAAAANK YOU!! PinmemberRickard Andersson10-Jun-02 7:12 
GeneralA note about exporting template classes in VC++... PinmemberVincent Richard6-Jun-02 21:11 
GeneralAFX_EXT_CLASS PinmemberMarc Richarme6-Jun-02 7:37 
GeneralRe: AFX_EXT_CLASS PinmemberAlexpro11-Jun-02 20:18 
GeneralRe: AFX_EXT_CLASS PinmemberMarc Richarme11-Jun-02 22:05 

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