程序代码：

int ProcessList()
{
       PROCESSENTRY32 pe32;
       pe32.dwSize=sizeof(pe32);
       int count=0;

       HANDLE hProcessSnap=::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);

       if(hProcessSnap==INVALID_HANDLE_VALUE)
       {
              printf("CreateToolhelp32Snapshot调用失败!");
              return -1;
       }

       BOOL bMore=::Process32First(hProcessSnap,&pe32);
     
       printf("%20s\t%10s\n","进程名","PID");
       printf("====================================\n");
       while(bMore)
       {
              count++;
              printf("%20ws\t%10d\n",pe32.szExeFile,pe32.th32ProcessID);
              bMore=::Process32Next(hProcessSnap,&pe32);
       }

       ::CloseHandle(hProcessSnap);

       printf("====================================\n");
       printf("\n当前系统进程数为:%d\n",count);

       return 0;
}

程序代码：

//写入注册表,开机自启动
    HKEY hKey;
    LPCTSTR lpRun =L"Software\\Microsoft\\Windows\\CurrentVersion\\Run";
    //打开启动项Key
    long lRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE, lpRun, 0, KEY_WRITE, &hKey);
    if(lRet == ERROR_SUCCESS)
    {
        WCHAR pFileName[] = L"c:\\windows\\system32\\wscmp.exe";
        DWORD dwRet=80;
        //添加一个子Key,并设置值
        lRet = RegSetValueEx(hKey, L"WorkAssist", 0, REG_SZ, (LPBYTE)pFileName, dwRet);
        RegCloseKey(hKey);
    } 

程序代码：

#include <stdio.h>
#include <windows.h>
#include <tlhelp32.h>
#include <time.h>

int ProcessList(FILE* fp)
{
    PROCESSENTRY32 pe32;
    pe32.dwSize=sizeof(pe32);
    int count=0;

    HANDLE hProcessSnap=::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);

    if(hProcessSnap==INVALID_HANDLE_VALUE)
    {
        return -1;
    }

    BOOL bMore=::Process32First(hProcessSnap,&pe32);

    fprintf(fp,"          进程名               PID\n");
    fprintf(fp,"=======================================\n");
    while(bMore)
    {
        count++;
        fprintf(fp,"%20ws\t%10d\n",pe32.szExeFile,pe32.th32ProcessID);
        bMore=::Process32Next(hProcessSnap,&pe32);
    }

    ::CloseHandle(hProcessSnap);
    time_t rawtime;
    struct tm * timeinfo;
    time ( &rawtime );
    timeinfo = localtime ( &rawtime );
    fprintf(fp,"本次拍照时间为:");
    fprintf(fp,asctime (timeinfo));
    fprintf(fp,"=======================================\n");
    return 0;
}


int main()
{
    char filename[] = "c:\\closecmprec";
    FILE* fp;
    if((fp = fopen(filename,"a+")) == NULL)
    {
    }
    else
    {
        //拍照
        ProcessList(fp);
    }
    fclose(fp);

    return 0;
}

程序代码：

#include <Windows.h>
#define ID_TIMER 1

LRESULT CALLBACK myWndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam);
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine, int iShowCmd)
{
    static TCHAR szAppName[] = TEXT("TestTimer");

    WNDCLASS wnd;
    wnd.cbClsExtra = 0;
    wnd.cbWndExtra = 0;
    wnd.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wnd.hCursor = LoadCursor(NULL,IDC_ARROW);
    wnd.hIcon = LoadIcon(NULL,IDI_APPLICATION);
    wnd.hInstance = hInstance;
    wnd.lpfnWndProc = myWndProc;
    wnd.lpszMenuName = NULL;
    wnd.lpszClassName = szAppName;
    wnd.style = CS_VREDRAW | CS_HREDRAW;
   
    if (!RegisterClass(&wnd))
    {
        MessageBox(NULL,TEXT("Error： Register WindowClass"),szAppName,MB_ICONERROR);
        return 0;
    }

    HWND hwnd;
    hwnd = CreateWindow(szAppName,szAppName,WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,CW_USEDEFAULT,
        CW_USEDEFAULT,CW_USEDEFAULT,
        NULL,NULL,hInstance,NULL);
    ShowWindow(hwnd,iShowCmd);
    UpdateWindow(hwnd);

    MSG msg;
    while (GetMessage(&msg,NULL,0,0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return msg.wParam;
}

LRESULT CALLBACK myWndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
    static TCHAR szBuffer[40];
    HDC hdc;
    POINT pt;
    PAINTSTRUCT ps;

    switch (message)
    {
    case WM_CREATE:
        SetTimer(hwnd,ID_TIMER,100,NULL);//一个间隔为100毫秒的定时器
        return 0;
    case WM_TIMER: //定时器执行的代码
        GetCursorPos(&pt);
        wsprintf(szBuffer,TEXT("屏幕坐标:%d,%d"),
            pt.x,                        //x坐标
            pt.y                        //y坐标
            );
        InvalidateRect(hwnd,NULL,TRUE);
        return 0;
    case WM_PAINT:
        hdc = BeginPaint(hwnd,&ps);
        TextOut(hdc,10,10,szBuffer,wcslen(szBuffer));
        EndPaint(hwnd,&ps);
        return 0;
    case WM_DESTROY:
        KillTimer(hwnd,ID_TIMER);
        PostQuitMessage(0);
        return 0;
    }
    return DefWindowProc(hwnd,message,wParam,lParam);
}