I cannot convert a textBox's text into a c-string

[gdavid]

Hi. I Have started using Visual C++ 2008 a month ago. I Tried to make a GUI calculator but i cannot convert the textbox's text with the atof() function. The function cannot convert String^ type into a number. How can i convert from a String^ into c-string? Or how can i simple get the value of the textbox's text? By the way what kind of type String^ is? Please help me. Thanks. :-)

[weaknessforcats]

A String^ is a handle to a C++ object created on the garbage collected heap managed by the CLR.

String^ str = gcnew String("Hello");
 

You use the handle with the -> syntax for C++ pointers.

So, your immediate problem is just converting a String to a C string array of char.

Read up on interoperability here.