UnManaged VC++ to call C# DLL

[Mads Westen]

Hi,

I want to create a "dynamic" unmanaged VC++ wrapper that can call any C#
DLL.

I'm thinking that I call the the wrapper from another program like this:
dllcall(name_of _wrapper_functi on , name_of_C#funct ion_parms_to_be _handled)
First off I want to know if my idea is possible, but a simple example would
be nice. :)

My knowledge in VC++ is very limited, but I have this code from a example.
This works but as you can see the it is some very simple functions:

<<-- CODE -->>
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

const int STRMAX = 255;
static char* m_buffer;

// Definition of the Dynamic Link Library Initialization function - LibMain.
// This is called only once - when the XAL statement DllOpen is called for
// the first time. Any further calls of DllOpen will not result in calls to
// the LibMain function until the XAL statement DllClose has been called.
BOOL APIENTRY DllEntryPoint( HINSTANCE hinstDll,
DWORD fdwRreason,
LPVOID plvReserved)
{
switch (fdwRreason)
{
case DLL_THREAD_ATTA CH:
case DLL_THREAD_DETA CH:
return 1;

case DLL_PROCESS_ATT ACH:

TRACE0("CPPXAL. DLL Initializing!\n ");

// Put initialization code here (Run the first time DllOpen is
called)
// for each process
m_buffer = (char*)malloc(S TRMAX*sizeof(ch ar));
if( NULL == m_buffer )
return 0;
else
return 1;

case DLL_PROCESS_DET ACH:
free(m_buffer);
return 1 ;
}
return 0;
}

extern "C" char* FAR PASCAL EXPORT STR2UPPER(long unused, const char*
parameter)
{
m_buffer = AnsiUpper((char *)parameter);
return m_buffer;
}

extern "C" char* FAR PASCAL EXPORT STR2LOWER(long unused, const char*
parameter)
{
m_buffer = AnsiLower((char *)parameter);
return m_buffer;
}

>>-- CODE --<<

Best regards
Mads

[Jochen Kalmbach [MVP]]

Hi Mads!

I want to create a "dynamic" unmanaged VC++ wrapper that can call any C#
DLL.

First: You need to host the CLR into your process either indirect (via
/clr compiler flag) or by direct (via CLR-Hosting).
http://www.gotdotnet.com/team/clr/ab...r_Hosting.aspx

Then you can call whatever you want via Reflection / System.Activato r

Greetings
Jochen
PS: Multiposting is very bad...