extern HANDLE hInst; /* Instance handle */
extern HWND hOurWnd; /* Main Window Handle */
extern int ret; /* work variable */
#define PRBUF_LEN 50
extern char prbuf[PRBUF_LEN]; /* work buffer */
/* 菜单IDs */
#define IDM_START 101
#define IDM_ABOUT 102
#define IDM_STOP 103
#define IDM_EXIT 104
#define IDM_SETTINGS 105
/* 对话框控制IDs