c# - How to start notepad.exe in hidden mode in windows application? -

i trying start notepad.exe in hidden mode below code have written:-

try {      processstartinfo startinfo = new processstartinfo();      startinfo.createnowindow = false;      startinfo.useshellexecute = false;      startinfo.filename = "notepad.exe";      startinfo.windowstyle = processwindowstyle.hidden;      startinfo.arguments = @"c:\users\sujeet\documents\test.txt"; } catch {   } 

but problem process(i.e. notepad.exe) gets started startinfo.windowstyle = processwindowstyle.hidden not working. have surfed net problem not able proper solution.

this version works on box:

try {     processstartinfo startinfo = new processstartinfo();     startinfo.createnowindow = false;     startinfo.useshellexecute = true;     startinfo.filename = @"%windir%\system32\notepad.exe";     startinfo.windowstyle = processwindowstyle.hidden;     startinfo.arguments = @"c:\users\sujeet\documents\test.txt";     process.start(startinfo); } catch { } 

i win32exception telling file (test.txt) cannot found, process runs, , no window visible.

take care exit process, or user end invisible processes running.

if application uncooperative (like calc.exe mentioned in comments), try following:

define somewhere:

    [dllimport("user32.dll")]     private static extern bool showwindow(intptr hwnd, int ncmdshow);     const int sw_show = 5;     const int sw_hide = 0; 

and following after crating process:

    var proc = process.start(startinfo);     while (proc.mainwindowhandle == intptr.zero) //note: works long process creates main window.         system.threading.thread.sleep(10);     showwindow(proc.mainwindowhandle, sw_hide); 

i don't know why path %windir%\system32\calc.exe not work, works startinfo.filename = @"c:\windows\system32\calc.exe";