windows进程函数试炼

实践一下windows进程相关函数：

代码如下：

 

  1 // test__getinformation.cpp : 定义控制台应用程序的入口点。

  2 //

  3 

  4 #include "stdafx.h"

  5 #include <windows.h>

  6 #include <TlHelp32.h>

  7 

  8 #ifndef CONST

  9 #define CONST const

 10 #endif

 11 

 12 #ifndef IN

 13 #define IN

 14 #endif

 15 

 16 #ifndef OUT

 17 #define OUT

 18 #endif

 19 

 20 #ifndef INOUT

 21 #define INOUT

 22 #endif

 23 

 24 #ifndef OPTIONAL

 25 #define OPTIONAL

 26 #endif

 27 

 28 

 29 namespace TEST__GETINFORMATION

 30 {

 31 

 32     //获取当前进程id

 33     DWORD GetCurrentProcessId()

 34     {

 35         return ::GetCurrentProcessId();

 36     }

 37 

 38     //获取当前进行名称

 39     BOOL GetCurrentProcessName(INOUT LPTSTR szCurrentProcessName, IN DWORD cchCurrentProcessNameSize)

 40     {

 41         if (0 != ::GetModuleFileName(NULL, szCurrentProcessName, cchCurrentProcessNameSize))

 42         {

 43             return TRUE;

 44         }

 45         return FALSE;

 46     }

 47 

 48     //根据进程名称获取进程id（根据进程id可以用OpenProcess函数获取进程句柄，有了句柄就可以做任何事情了）

 49     BOOL GetProcessIdByName(IN LPTSTR szProcessName, IN DWORD cchProcessNameSize, OUT LPDWORD lpdwProcessId)

 50     {

 51         HANDLE hSnapshot = NULL;

 52         PROCESSENTRY32 stProcessInfor;

 53 

 54         hSnapshot = ::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);

 55         if (INVALID_HANDLE_VALUE == hSnapshot) return FALSE;

 56         stProcessInfor.dwSize = sizeof(PROCESSENTRY32);

 57         if (FALSE == ::Process32First(hSnapshot, &stProcessInfor)) return FALSE;

 58         if (0 == ::lstrcmp(szProcessName, stProcessInfor.szExeFile))

 59         {

 60             *lpdwProcessId = stProcessInfor.th32ProcessID;

 61             return TRUE;

 62         }

 63         while (TRUE == ::Process32Next(hSnapshot, &stProcessInfor))

 64         {

 65             if (0 == ::lstrcmp(szProcessName, stProcessInfor.szExeFile))

 66             {

 67                 *lpdwProcessId = stProcessInfor.th32ProcessID;

 68                 return TRUE;

 69             }

 70         }

 71         return FALSE;

 72     }

 73 

 74     //根据进程id获取进程句柄

 75     HANDLE GetProcessHandleById(IN DWORD dwProcessId, IN DWORD dwDesiredAccess)

 76     {

 77         return ::OpenProcess(dwDesiredAccess, TRUE, dwProcessId);

 78     }

 79 

 80 }

 81 int _tmain(int argc, _TCHAR* argv[])

 82 {

 83     //获取当前进程id

 84     DWORD dwCurrentProcessId = TEST__GETINFORMATION::GetCurrentProcessId();

 85 

 86     //获取当前进行名称

 87     LPTSTR szCurrentProcessName = (LPTSTR)::HeapAlloc(::GetProcessHeap(), HEAP_ZERO_MEMORY, MAX_PATH*sizeof(TCHAR));

 88     if (NULL == szCurrentProcessName) return 0;

 89     BOOL bSuccess = TEST__GETINFORMATION::GetCurrentProcessName(szCurrentProcessName, MAX_PATH);

 90     ::HeapFree(::GetProcessHeap(), 0, szCurrentProcessName);

 91     szCurrentProcessName = NULL;

 92 

 93     //根据进程名称获取进程id（根据进程id可以用OpenProcess函数获取进程句柄，有了句柄就可以做任何事情了）

 94     LPTSTR szGoComProcessName = (LPTSTR)::HeapAlloc(::GetProcessHeap(), HEAP_ZERO_MEMORY, MAX_PATH*sizeof(TCHAR));

 95     LPTSTR szGoComFileName = TEXT("GoCom.exe");

 96     DWORD dwGoGcomProcessId = 0;

 97     ::wsprintf(szGoComProcessName, TEXT("%s"), szGoComFileName);

 98     bSuccess = TEST__GETINFORMATION::GetProcessIdByName(szGoComProcessName, MAX_PATH, &dwGoGcomProcessId);

 99     ::HeapFree(::GetProcessHeap(), 0, szGoComProcessName);

100     szGoComProcessName = NULL;

101 

102     //根据进程id获取进程句柄

103     HANDLE hProcessHandle = TEST__GETINFORMATION::GetProcessHandleById(dwGoGcomProcessId, PROCESS_ALL_ACCESS);

104     if (FALSE == hProcessHandle) return 0;

105     ::CloseHandle(hProcessHandle);

106 

107     return 0;

108 }