Re: WaitForSingleObject does not wait

From:

"Kilo" <kilo@yahoo.com.hk>

Newsgroups:

microsoft.public.vc.mfc

Date:

Wed, 16 Sep 2009 21:20:11 +0800

Message-ID:

<#WP0qBtNKHA.5488@TK2MSFTNGP02.phx.gbl>

I have just found that if I disable Vista's UAC. It can wait until the
process terminates.

My program starts when Windows starts, I cannot ask the user to elevate my
program each time. I want the user to elevate once only (at the time of
installation or first time of execution). However, this is not the issue of
my original post.

"Kilo" <kilo@yahoo.com.hk> ??? news:%23RxCHxsNKHA.1232@TK2MSFTNGP05.phx.gbl
???...

Here is my code. It pops up a message box with text "Wait object". But I
can still see the dialog box of that process.

DWORD createProcess(CString applicationPath, CString parameter) {
   STARTUPINFO startupInfo;
   ZeroMemory(&startupInfo, sizeof(startupInfo));
   startupInfo.cb = sizeof(startupInfo);

   PROCESS_INFORMATION processInfo;
   ZeroMemory(&processInfo, sizeof(processInfo));

   DWORD returnCode = 0;

   parameter = applicationPath + _T(' ') + parameter;

   if (!CreateProcess(
       NULL,
       parameter.LockBuffer(),
       NULL,
       NULL,
       FALSE,
       0,
       NULL,
       NULL,
       &startupInfo,
       &processInfo)) {
       returnCode = GetLastError();
   }

   parameter.UnlockBuffer();

   switch (WaitForSingleObject(processInfo.hProcess, INFINITE)) {
       case WAIT_ABANDONED:
           AfxMessageBox(_T("Wait abandoned"));
       break;
       case WAIT_TIMEOUT:
           AfxMessageBox(_T("Wait timeout"));
       break;
       case WAIT_OBJECT_0:
           AfxMessageBox(_T("Wait object"));
       break;
       case WAIT_FAILED:
           AfxMessageBox(_T("Wait failed"));
       break;
   }

   CloseHandle(processInfo.hThread);
   CloseHandle(processInfo.hProcess);

   // zero if success
   // non-zero if fail
   return returnCode;
}

"Goran" <goran.pusic@gmail.com> ???
news:2c3cf2af-f739-4b5e-80c7-99176c19ed17@f10g2000vbf.googlegroups.com
???...
On Sep 16, 12:56 pm, "Kilo" <k...@yahoo.com.hk> wrote:

I have called CreateProcess to create a process. Then I called
WaitForSingleObject with INFINITE timeout. However, it does not wait.

It does. Chances are that your code is wrong.