return a char array from c++ dll to c#

Do you have any idea about how to return a char array or CString from C++ DLL function to c#?
converting the char array or CString to a C# string is even better.
thank you

 

I think the best thing would be to export a C function from the DLL which takes a c# StringBuilder as a parameter.
e.g:-

Code:

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

 

If you can let us know which C++ function are you using in C#?