跪求俄罗斯方块C语言的解析，WIN-TC的那种

#include <stdlib.h>
#include <graphics.h>
#include <bios.h>
#define mDRAW 5
#define mLINE 6
#define mADOWN 7
#define mGEN 8
#define mLEFT 75
#define mRIGHT 77
#define mSPACE 57
#define mDOWN 80
#define mESC 1
#define TIMEINT 7
#define MAXX 9
#define MAXY 30
#define BACKCOLOR BLACK
#define WINX 50
#define WINY 470
#define GAP 6
#define AREAX (WINX+GAP)
#define AREAY (WINY-GAP)
#define BOXW 15
int oldarea[MAXY+1][MAXX];
int area[MAXY+1][MAXX];
int actW,actH,actX,actY;
int curX,curY,curColor,curW,curH;
int newX,newY,newColor,newW,newH;
int active;
int box[4][4];
int FORCOLOR;
int MESSAGE;
int BOX[7][4][4]={
{
{1,1,1,1},
{0,0,0,0},
{0,0,0,0},
{0,0,0,0}
},{
{1,1,1,0}