C / C++ / MFC

//Global Variable
DWORD g_nRetVal = 0;
DWORD g_nWaitCode = 0;
HANDLE g_hWaited = NULL;

DWORD WINAPI RunUtils(void *pParam) { 
	LPCTSTR szExe = TEXT("Path of executable");
	LPTSTR szParams = TEXT(" /d C:");
	HANDLE hEvent = NULL;
	PROCESS_INFORMATION ProcessInfo;
	ZeroMemory(&ProcessInfo, sizeof(ProcessInfo));
	STARTUPINFO StartupInfo;
	ZeroMemory(&StartupInfo, sizeof(StartupInfo));
	StartupInfo.cb = sizeof(StartupInfo);
	StartupInfo.dwFlags = STARTF_USESHOWWINDOW;
	StartupInfo.wShowWindow = SW_HIDE;
	hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
	if (CreateProcess(szExe, szParams, NULL, NULL, FALSE, CREATE_NEW_CONSOLE, NULL, NULL, &StartupInfo, &ProcessInfo)) {
		g_nWaitCode = WaitForSingleObject(ProcessInfo.hProcess, INFINITE);
		switch (g_nWaitCode) {
			case WAIT_OBJECT_0:
				GetExitCodeProcess(ProcessInfo.hProcess, &g_nRetVal);
				break;

			case WAIT_FAILED:
				g_nWaitCode = GetLastError();
				break;
		}
		::CloseHandle(ProcessInfo.hProcess);
		::CloseHandle(ProcessInfo.hThread);
		
		ResetEvent(hEvent);

		HWND hWnd = (HWND) pParam;
		SendMessage(hWnd, WM_USER_THREAD_WAITED, 0, 0);
	}
	return 0;
}

void CThunghiemDlg::OnButtonOpen()
{
	// TODO: Add your control notification handler code here
	HANDLE hExecThread = NULL;
	if(m_bCleanUp)
	{
		hExecThread = CreateThread(NULL, 0, &RunUtils, (LPVOID) m_hWnd, 0, NULL);
	}
}

void CThunghiemDlg::OnButtonOpen() 
{
	ShellExecute(NULL, "open", "path of executable", NULL, NULL, SW_SHOWNORMAL);	
	
}

pandit84 wrote:

...and Reads Junk characters.

printf("The date %s", ptr) ;

::WaitCommEvent

pandit84 wrote:

. But it never get any event and it goes into continuous wait state.

pandit84 wrote:

So I have removed that and tried to read the Port using ::ReadFile () without using any event.