#include

#define ID_TIMER 1
#define STRMAXLEN 25 //一个显示列的最大长度
#define STRMINLEN 8 //一个显示列的最小长度

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
//////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////
typedef struct tagCharChain //整个当作屏幕的一个显示列,这是个双向列表
{
struct tagCharChain *prev; //链表的前个元素
TCHAR ch; //一个显示列中的一个字符
struct tagCharChain *next; //链表的后个元素
}CharChain, *pCharChain;

typedef struct tagCharColumn
{
CharChain *head, *current, *point;
int x, y, iStrLen; //显示列的开始显示的x,y坐标,iStrLen是这个列的长度
int iStopTimes, iMustStopTimes; //已经停滞的次数和必须停滞的次数,必须停滞的次数是随机的
}CharColumn, *pCharColumn;

int main(HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("matrix") ;
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ;

wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH) ;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName = szAppName ;

if(!RegisterClass (&wndclass))
{
MessageBox (NULL, TEXT ("此程序必须运行在NT下!"), szAppName, MB_ICONERROR) ;
return 0;
}

hwnd = CreateWindow (szAppName, NULL,
WS_DLGFRAME | WS_THICKFRAME | WS_POPUP,
0, 0,
GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN),
NULL, NULL, hInstance,
NULL) ;

ShowWindow (hwnd, SW_SHOWMAXIMIZED) ; //最大化显示
UpdateWindow (hwnd) ;
ShowCursor(FALSE); //隐藏鼠标光标

srand ((int) GetCurrentTime ()) ; //初始化随机数发生器
while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
ShowCursor(TRUE); //显示鼠标光标
return msg.wParam ;
}

TCHAR randomChar() //随机字符产生函数
{
return (TCHAR)(rand()%(126-33)+33); //33到126之间
}