Looking for guidance with regards to System::String variables and functions.

[BubbaGeeNH]

I'm attempting to pass a String^ variable to a function and updating the variable within the function. When I return from the function I want the updated variable to be what was assigned in the function. (I'm still trying to learn the Managed C++ coding and can't find a good example.) #include "stdafx.h" using namespace System; void ChangeString(String^); int main(array ^args) { String^ Outside = gcnew String("Outside"); ChangeString(Outside); Console::WriteLine(Outside); return 0; } void ChangeString(String^ variable) { Console::WriteLine("Recieved: {0}",variable); variable = "Changed"; Console::WriteLine("New: {0}",variable); };

George

[Mark Salsbery]

System.String is immutable - you cannot change the string's contents once it's initialized. You could use a System.Text.StringBuilder instead, which is mutable. You could also return a new System.String instead of trying to modify the passed String. Mark

Mark Salsbery Microsoft MVP - Visual C++ :java:

[Dave Doknjas]

void ChangeString(String %^ variable) Mark is right - System::String is immutable - but that's fine: a new one is passed back if you use '%'. I think StringBuilder is overkill for this - StringBuilder, as its name implies, is for building up large strings - you'll not gain anything by using it in cases like this.

David Anton http://www.tangiblesoftwaresolutions.com Convert VB to C#, C++, or Java Convert C# to VB, C++, or Java Convert C++ to C#, VB, or Java Convert Java to C#, C++, or VB