BorlandTalk.com

Daniel · Guest

I am attempting to spawn an application on another desktop (with the new
desktop visible, thereby hiding the default desktop).

For reference, the launching of the application is performed in a worker
thread, where this thread waits for the launched application to close
before it terminates, closing the desktop etc.

I can see my launched program running in Task Manager but the new desktop
is not made visible.

I'm currently using all access options until I can sort out where I am
going wrong.

I'd appreciate someone pointing me where I am going wrong. TIA.

Here is the code:

// temporary until I get this to work
#define DESKTOP_ALL ( DESKTOP_READOBJECTS | DESKTOP_CREATEWINDOW |
DESKTOP_CREATEMENU | DESKTOP_HOOKCONTROL |
DESKTOP_JOURNALRECORD | DESKTOP_JOURNALPLAYBACK |
DESKTOP_ENUMERATE | DESKTOP_WRITEOBJECTS |
DESKTOP_SWITCHDESKTOP )

// temporary until I get this to work
#define WINSTA_ALL ( WINSTA_ACCESSCLIPBOARD | WINSTA_ACCESSGLOBALATOMS |
WINSTA_CREATEDESKTOP | WINSTA_ENUMDESKTOPS |
WINSTA_ENUMERATE |
WINSTA_EXITWINDOWS | WINSTA_READATTRIBUTES |
WINSTA_READSCREEN |
WINSTA_WRITEATTRIBUTES )

void __fastcall TSecondaryDesktopThread::Execute()
{

HWINSTA AWindowStation = ::CreateWindowStation("NewStation", NULL,
WINSTA_ALL, NULL);
::SetProcessWindowStation(AWindowStation);

HDESK ADesktop = ::CreateDesktop("NewDesktop", NULL, NULL, 0,
DESKTOP_ALL, NULL);

::SetThreadDesktop(ADesktop);
::SwitchDesktop(ADesktop);

AnsiString AppExe = "SecondDesktopApp.exe";
STARTUPINFO si;
PROCESS_INFORMATION pi;
DWORD dwStatus;

ZeroMemory(&si, sizeof(si));
si.cb = sizeof(si);
ZeroMemory(&pi, sizeof(pi));

si.lpTitle = "NewDesktop";
si.lpDesktop = "NewStation\NewDesktop";

::CreateProcess(NULL, AppExe.c_str(), NULL, NULL, false,
NORMAL_PRIORITY_CLASS,
NULL, NULL, &si, &pi);

do
{
::GetExitCodeProcess(pi.hProcess, &dwStatus);
::Sleep(1);
} while( dwStatus == STILL_ACTIVE );

::CloseHandle(pi.hProcess);
::CloseHandle(pi.hThread);

::CloseDesktop(ADesktop);
::CloseWindowStation(AWindowStation);
}

Daniel

--
Using Opera's revolutionary e-mail client: http://www.opera.com/m2/

Daniel · Guest

I have since read on another site that applications are only visible on
"WinSta0". After removing the code that creates another Windows Station,
my application is now visible. But I now have another problem.

In this launched application, I am trying to capture WM_QUERYENDSESSION
and WM_ENDSESSION via WndProc() to prevent the user from logging off. The
code works perfectly when running under the default desktop but the
messages are never received when running under the newly created desktop..

Any ideas how I can get this to work.

TIA.

Daniel.

On Mon, 07 Mar 2005 10:59:58 +1100, Daniel <d.jimenez (AT) comvision (DOT) net.au>
wrote:

Remy Lebeau (TeamB) · Guest

"Daniel" <d.jimenez (AT) comvision (DOT) net.au> wrote

Remy Lebeau (TeamB) · Guest

"Daniel" <d.jimenez (AT) comvision (DOT) net.au> wrote

Daniel · Guest

Hi Gambit,

I decided to strip the code to the bare bones for simplicity of code on
the post, I removed the WaitForSingleObject, as well as any error
checking, the restoring of the previous desktop is done in another
location.

Thanks

daniel.

On Sun, 6 Mar 2005 22:24:05 -0800, Remy Lebeau (TeamB)
<no.spam (AT) no (DOT) spam.com> wrote:

Daniel · Guest