windows进程函数试炼

实践一下windows进程相关函数：

代码如下：

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

 #include "stdafx.h"
 #include <windows.h>
 #include <TlHelp32.h>

 #ifndef CONST
 #define CONST const
 #endif

 #ifndef IN
 #define IN
 #endif

 #ifndef OUT
 #define OUT
 #endif

 #ifndef INOUT
 #define INOUT
 #endif

 #ifndef OPTIONAL
 #define OPTIONAL
 #endif

 namespace TEST__GETINFORMATION
 {

     //获取当前进程id
     DWORD GetCurrentProcessId()
     {
         return ::GetCurrentProcessId();
     }

     //获取当前进行名称
     BOOL GetCurrentProcessName(INOUT LPTSTR szCurrentProcessName, IN DWORD cchCurrentProcessNameSize)
     {
         if ( != ::GetModuleFileName(NULL, szCurrentProcessName, cchCurrentProcessNameSize))
         {
             return TRUE;
         }
         return FALSE;
     }

     //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）
     BOOL GetProcessIdByName(IN LPTSTR szProcessName, IN DWORD cchProcessNameSize, OUT LPDWORD lpdwProcessId)
     {
         HANDLE hSnapshot = NULL;
         PROCESSENTRY32 stProcessInfor;

         hSnapshot = ::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, );
         if (INVALID_HANDLE_VALUE == hSnapshot) return FALSE;
         stProcessInfor.dwSize = sizeof(PROCESSENTRY32);
         if (FALSE == ::Process32First(hSnapshot, &stProcessInfor)) return FALSE;
         if ( == ::lstrcmp(szProcessName, stProcessInfor.szExeFile))
         {
             *lpdwProcessId = stProcessInfor.th32ProcessID;
             return TRUE;
         }
         while (TRUE == ::Process32Next(hSnapshot, &stProcessInfor))
         {
             if ( == ::lstrcmp(szProcessName, stProcessInfor.szExeFile))
             {
                 *lpdwProcessId = stProcessInfor.th32ProcessID;
                 return TRUE;
             }
         }
         return FALSE;
     }

     //根据进程id获取进程句柄
     HANDLE GetProcessHandleById(IN DWORD dwProcessId, IN DWORD dwDesiredAccess)
     {
         return ::OpenProcess(dwDesiredAccess, TRUE, dwProcessId);
     }

 }
 int _tmain(int argc, _TCHAR* argv[])
 {
     //获取当前进程id
     DWORD dwCurrentProcessId = TEST__GETINFORMATION::GetCurrentProcessId();

     //获取当前进行名称
     LPTSTR szCurrentProcessName = (LPTSTR)::HeapAlloc(::GetProcessHeap(), HEAP_ZERO_MEMORY, MAX_PATH*sizeof(TCHAR));
     if (NULL == szCurrentProcessName) return ;
     BOOL bSuccess = TEST__GETINFORMATION::GetCurrentProcessName(szCurrentProcessName, MAX_PATH);
     ::HeapFree(::GetProcessHeap(), , szCurrentProcessName);
     szCurrentProcessName = NULL;

     //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）
     LPTSTR szGoComProcessName = (LPTSTR)::HeapAlloc(::GetProcessHeap(), HEAP_ZERO_MEMORY, MAX_PATH*sizeof(TCHAR));
     LPTSTR szGoComFileName = TEXT("GoCom.exe");
     DWORD dwGoGcomProcessId = ;
     ::wsprintf(szGoComProcessName, TEXT("%s"), szGoComFileName);
     bSuccess = TEST__GETINFORMATION::GetProcessIdByName(szGoComProcessName, MAX_PATH, &dwGoGcomProcessId);
     ::HeapFree(::GetProcessHeap(), , szGoComProcessName);
     szGoComProcessName = NULL;

     //根据进程id获取进程句柄
     HANDLE hProcessHandle = TEST__GETINFORMATION::GetProcessHandleById(dwGoGcomProcessId, PROCESS_ALL_ACCESS);
     if (FALSE == hProcessHandle) return ;
     ::CloseHandle(hProcessHandle);

     return ;
 }