Pointer to Pointers?

[Gary Nastrasio]

Let's say I have a function such as:

void ConvertCharToSt ring(char* szInput, System::String^ strOutput)
{
strOutput = Marshal::PtrToS tringAnsi(stati c_cast<System:: IntPtr>(szInput ));
}

Clearly if I call the function like this, it won't work because the
handle of strOutput is passed by value and cannot be changed by
Marshal::PtrToS tringAnsi:

System::String^ strMyString;
ConvertCharToSt ring("Some text", strMyString);

This is where I would normally use a pointer to pointer in C++...

What is the proper solution to this problem using the above function
prototype? Also, System::String^ ConvertCharToSt ring(char* szInput); is
not an option.

Thanks guys!

Gary

[Carl Daniel [VC++ MVP]]

"Gary Nastrasio" <ga***********@ hotmail.com> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. ..

Let's say I have a function such as:

void ConvertCharToSt ring(char* szInput, System::String^ strOutput)

#using <mscorlib.dll >
#using <system.dll>

using namespace System;
using namespace System::Runtime ::InteropServic es;

public ref class X
{
void ConvertCharToSt ring(char* szInput, System::String^ % strOutput)
{
strOutput =
Marshal::PtrToS tringAnsi(stati c_cast<System:: IntPtr>(szInput ));
}

void Test()
{
String^ strOutput;
ConvertCharToSt ring("Hello",st rOutput);
}
};

-cd

[Gary Nastrasio]

That worked perfectly. Thanks! I wasn't even aware of the % operator. :)

Carl Daniel [VC++ MVP] wrote:

"Gary Nastrasio" <ga***********@ hotmail.com> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. ..

Let's say I have a function such as:

void ConvertCharToSt ring(char* szInput, System::String^ strOutput)

#using <mscorlib.dll >
#using <system.dll>

using namespace System;
using namespace System::Runtime ::InteropServic es;

public ref class X
{
void ConvertCharToSt ring(char* szInput, System::String^ % strOutput)
{
strOutput =
Marshal::PtrToS tringAnsi(stati c_cast<System:: IntPtr>(szInput ));
}

void Test()
{
String^ strOutput;
ConvertCharToSt ring("Hello",st rOutput);
}
};

-cd