Error Add Class from another project in the same solutions C++ - c++

Question

I'm just beginning to write code with C++, and I got stuck when I want to add reference to class from other project from the same solutions.
my Main code located at :
InventoryAppDLL (contains code to access Sql Database)
class : dbConnection.h
Code:
ref class dbConnection
{
public:
dbConnection();
void SetCommandText(String ^command,bool ^commandText);
int ExecuteScalar();
DataSet^ ExecuteDataSet();
DataTable^ ExecuteDataTable();
protected:
~dbConnection();
private:
DbConnection ^conn;
DbCommand ^cmd;
ConnectionStringSettings ^settings;
DbProviderFactory ^fac;
};
after i build the main project (InventoryAppDLL), it was success and contains no errors.
but after I include the header into another project (InventoryAppService),and then I build it, it contains error :
error C2143: syntax error : missing ';' before '^'
when I reference to the error, I've got ConnectionStringSettings missing library on dbConnectionClass (InventoryAppDLL).
private:
DbConnection ^conn;
DbCommand ^cmd;
ConnectionStringSettings ^settings; // <---
DbProviderFactory ^fac;
};

Answer 1

I think you don't even need to include the header file. Since you have already added a reference from the consuming project to the project containing this class, the consuming project can read the metadata from the DLL project and you can simply say:
auto x = ref new dbConnection();