Converting managed int to unmanaged PBYTE?

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

Tom Glenn - 27 May 2004 01:38 GMT

I have a managed method that has an int parameter that has to be passed to
an unmanaged method that takes a PBYTE and associated length as a DWORD.

Anyone have any sample code that shows how to do this?

Thanks.

Reply to this Message

Tomas Restrepo \(MVP\) - 27 May 2004 03:46 GMT

Tom,

> I have a managed method that has an int parameter that has to be passed to
> an unmanaged method that takes a PBYTE and associated length as a DWORD.
>
> Anyone have any sample code that shows how to do this?

#using <mscorlib.dll>
#include <windows.h>
#include <iostream>
using namespace System;

#pragma unmanaged
void f(LPBYTE buffer, DWORD size)
{
std::cout << "Buffer size: " << size << std::endl;
}

#pragma managed

__gc class A
{
public:
void Man(int n)
{
f( (LPBYTE)&n, sizeof(n) );
}
};

int main()
{
A* a = new A();
a->Man(12);
}

Reply to this Message

Tom Glenn - 27 May 2004 18:50 GMT

Thanks, how do you go in the opposite direction i.e. unmanaged to managed?
I can't seem to figure out how to take the length into account in this case.

> Tom,
>
[quoted text clipped - 30 lines]
> a->Man(12);
> }

Reply to this Message

Tomas Restrepo \(MVP\) - 28 May 2004 00:43 GMT

Hi Tom,

> Thanks, how do you go in the opposite direction i.e. unmanaged to managed?
> I can't seem to figure out how to take the length into account in this case.

Not quite sure what you're saying here... care to explain what you want to
do exactly in the opposite case?

Signature

Tomas Restrepo
tomasr@mvps.org

Reply to this Message

Converting managed int to unmanaged PBYTE?

Free Magazines