#define IDM_QUIT            101
#define IDM_ENTER           102
#define IDM_CLEAR           103
#define IDM_JOIN            104
#define IDM_ABOUT           105

#define ID_EXPR_STR         201
#define IDC_EXPR_1_BUTTON   202
#define IDC_EXPR_2_BUTTON   303
#define IDC_OK_BUTTON       204
#define IDC_CANCEL_BUTTON   205

#define IDC_ADDITION	    301
#define IDC_SUBTRACTION	    302
#define IDC_MULTIPLICATION  303
#define IDC_DIVISION	    304