windows给同名多进程发消息

来源：互联网发布：sql主键和外键的建立编辑：程序博客网时间：2024/04/28 23:57

#include <TlHelp32.h>

DWORD g_processID; //进程句柄
DWORD g_ThreadID; //线程句柄

CRITICAL_SECTION g_hCritical; //windows 锁句柄（确切的应该叫关键代码段）
bool IsExsit(CString strExeFile)
{

//加锁
//::EnterCriticalSection(&g_hCritical);
CString strFileName;
bool bFound = false;

PROCESSENTRY32 pe32 = { sizeof(pe32) };
HANDLE hSnapShot = NULL;

//系统内进行进程快照
hSnapShot = ::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
if (hSnapShot == INVALID_HANDLE_VALUE)
{

  //如果快照失败，释放锁
  ::LeaveCriticalSection(&g_hCritical);
  return bFound;
}
//遍历这些快照后的结果，直到找到我们需要的进程，如果没有找到就返回失败

BOOL bFlag = ::Process32First(hSnapShot, &pe32);
int nCurProcessId = GetCurrentProcessId();
while (bFlag)
{
  strFileName = CString(pe32.szExeFile);
  if (strFileName.CompareNoCase(strExeFile) == 0 && nCurProcessId != pe32.th32ProcessID)
  {
   bFound = true;
   g_processID = pe32.th32ProcessID;
   break;
  }
  bFlag = ::Process32Next(hSnapShot, &pe32);
}

//关闭系统快照
//::CloseToolhelp32Snapshot(hSnapShot);
//释放锁

//::LeaveCriticalSection(&g_hCritical);
return bFound;
}

//首先查看该进程是否存在，同时找到该进程的进程id
void CheckProcess()
{
DWORD dwErr;
if (IsExsit(_T("Dialog01.exe")))
{

  HWND hwnd = ::FindWindow(NULL, _T("Dialog01"));
  if (hwnd)
  {

   //根据句柄查找到该窗口对应的线程
   g_ThreadID = GetWindowThreadProcessId(hwnd, &g_processID);
   //发送消息
   CString Msg;
   Msg.Format(_T("Send msg wm_keyup to threadId:%d"),g_ThreadID);
   AfxMessageBox(Msg);
   ::PostThreadMessage(g_ThreadID, WM_KEYUP, 13, 13);
  }
  else
  {
   dwErr = GetLastError();
  }
}
}

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