void SetButtonStyle( UINT nStyle, BOOL bRedraw = TRUE );
nStyle
Specifies the button style.
bRedraw
Specifies whether the button is to be redrawn. A value of TRUE redraws the button. A value of FALSE does not redraw the button. The button is redrawn by default.
Changes the style of a button. See the Create member function for a list of possible button styles.
CButton::GetButtonStyle, BM_SETSTYLE