class CMainWindow
                  {
                    public :
                           void setPalette(void);                       
                  };
void setPalette(void)这个方法怎样在别的别的C++文件中实现
int main(int argc, char *argv[])
{
       CMainWindow mywindow;
       mywindow.setPalette();
       cout<<"helloword.c++\n";
       system("pause");
       return EXIT_SUCCESS;
}