Confusing char array

[abdul]

I have a function inside a class called "GetCaption" that lets the user retrieve current text assigned to a button. The caption is stored in a varible in the class as:

char *caption; 

Then the "GetCaption" function is like this:

    char  CGButton::GetCaption()
    {
            if (CGButton::Handle == NULL)
        {
            return NULL;
        }
        else
        {
            return (char)CGButton::caption;
        }
    } 

Now I want to use this function like this but it's giving me an eror message "Unhandled exception in...":

    MessageBox(NULL,(char*)mybutton.GetCaption(),"hello",MB_OK);