The CPROGRESSCTRL class provides a small number of member functions to set the progress bar:
Void SetRange (int nlower, int Nupper); This function is used to set the range of progress bars. The parameters NLOW and NUPPER specify a minimum and maximum value, and the scope of the progress bar is 0-100.
INT setPos (INT NPOS); used to set the current progress of the progress bar. The function returned is the previous progress of the progress bar.
INT Stepit (); makes progressive steps, the step size is set by the setstep function, the default step size is 10. The function returns the previous progress of the progress bar.
INT setstep; used to set the step length. The function returns the original step size.
