经过如下两个函数能够实现启动一个进程并得到其主窗口句柄。函数
BOOL CALLBACK CDSUpdate::EnumDSUMWindowsProc(HWND hwnd, LPARAM lParam)进程
{ast
DWORD dwID;thread
EnumParam* pEP = (EnumParam*)lParam;date
GetWindowThreadProcessId(hwnd, &dwID);process
if (dwID == pEP->m_dwProcessID)return
{ab
pEP->m_hMainWnd = hwnd;tar
return false;
}
return true;
}
HWND CDSUpdate::RunDSUM(CString sDSUMFile)
{
EnumParam ep;
STARTUPINFO si;
PROCESS_INFORMATION pi;
CString sFolder;
ZeroMemory(&si, sizeof(STARTUPINFO));
si.cb = sizeof(STARTUPINFO);
si.wShowWindow = SW_SHOW;
ZeroMemory(&pi, sizeof(PROCESS_INFORMATION));
UpdateLog(::Message, L"(RunDSUM): Start DSUM.");
if (!CreateProcess(NULL, (LPTSTR)(LPCTSTR)sDSUMFile, NULL, NULL, FALSE, 0, NULL, sDSUMFile.Left(sDSUMFile.ReverseFind('//')), &si, &pi))
{
UpdateLog(::Error, L"(RunDSUM): Start DSUM fail (%d).", GetLastError());
return NULL;
}
// Close process and thread handles.
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
ep.m_dwProcessID = pi.dwProcessId;
ep.m_hMainWnd = NULL;
for (int i = 0; i < 50; i++) // Retry about 10s.
{
Sleep(200);
EnumWindows(EnumDSUMWindowsProc, (LPARAM)&ep);
if (ep.m_hMainWnd)
break;
}
if (!ep.m_hMainWnd)
{
UpdateLog(::Error, L"(RunDSUM): Couldn't find the hwnd of DSUM.");
return NULL;
}
return ep.m_hMainWnd;
}