problem while wrapping unmanaged c++ code in managed c++

[Vinoth Kumar]

Hi

I have created a unmanaged class in a header file UnManaged.h

class UnManaged
{
UnManaged(){}
~UnManaged(){}
void HelloWorld(){}
};

I also created a .Net C++ class library to wrap this class and included the
header file "UnManaged. h" .

The Managed wrapper class definition follows,

__gc class ManagedClass
{

public ManagedClass()
{
m_objClass = new UnManaged()
}

~ManagedClass()
{
deelte m_objClass;
}

private:

UnManaged* m_objClass;
};

while building the class library code in .Net i am getting the following error

error LNK2019: unresolved external symbol _main referenced in function
_mainCRTStartup

Could anyone tell met why this linker error came and how to reolve this issue?

Thanks in advance