c# - Find window with specific text for a Process -

i'm trying find if window specific has been open process. process spawns multiple windows, , need check them all.

i have no trouble finding process, with

foreach (process p in process.getprocesses()) {   if (p.mainmodule.filename.tolower().endswith("foo.exe"))      findchildwindowwithtext(p); //do work 

the problem next. cannot use process' mainwindowtext, because changes whichever window activated.

then i've tried use windows function enumchildwindows , getwindowtext, not sure if i'm passing correct handle enumchildwindows. enumchildwindows works expected when passed mainwindowhandle, of course mainwindowhandle changes active window. passed process.handle, different handles , different results when switching app's windows. (i understand enumchildwindows returns handles not windows, controls in .net speak, that's no problem if caption of window too)

maybe doing wrong way , need different approach - again, problem simple finding window text matches specific regular expression. need function enumerates windows, visible in taskbar or so.

thanks

once have process, can enumerate windows in process , test if of them match window looking for.

you need following p/invoke declarations

[dllimport("user32", setlasterror=true)] [return: marshalas(unmanagedtype.bool)] private extern static bool enumthreadwindows(int threadid, enumwindowsproc callback, intptr lparam);  [dllimport("user32", setlasterror = true)] [return: marshalas(unmanagedtype.bool)] static extern bool enumchildwindows(intptr hwndparent, enumwindowsproc lpenumfunc, intptr lparam);  [dllimport("user32", setlasterror = true, charset = charset.auto)] private extern static int getwindowtext(intptr hwnd, stringbuilder text, int maxcount); 

the followng example of pair of functions can used find windows in specific process, understood question have process, problem enumerating windows.

public static intptr findwindowinprocess(process process, func<string, bool> comparetitle) {   intptr windowhandle = intptr.zero;    foreach (processthread t in process.threads)   {     windowhandle = findwindowinthread(t.id, comparetitle);     if (windowhandle != intptr.zero)     {       break;     }   }    return windowhandle; }  private static intptr findwindowinthread(int threadid, func<string, bool> comparetitle) {   intptr windowhandle = intptr.zero;   enumthreadwindows(threadid, (hwnd, lparam) =>   {     stringbuilder text = new stringbuilder(200);     getwindowtext(hwnd, text, 200);     if (comparetitle(text.tostring()))     {       windowhandle = hwnd;       return false;     }     return true;   }, intptr.zero);    return windowhandle; } 

then can call findwindowinprocess function find window that's title ends "abc" example.

intptr hwnd = findwindowinprocess(p, s => s.endswith("abc")); if (hwnd != intptr.zero)  {   // window found.... } 

of course can replace s => s.endswith("abc") expression satisfy search criteria window, regex etc.

here version of findthreadwindow check first level of child windows. take further , make recursive function if windows deeper down in hierarchy.

private static intptr findwindowinthread(int threadid, func<string, bool> comparetitle) {   intptr windowhandle = intptr.zero;   enumthreadwindows(threadid, (hwnd, lparam) =>   {     stringbuilder text = new stringbuilder(200);     getwindowtext(hwnd, text, 200);             if (comparetitle(text.tostring()))     {       windowhandle = hwnd;       return false;     }     else     {       windowhandle = findchildwindow(hwnd, comparetitle);       if (windowhandle != intptr.zero)       {         return false;       }     }     return true;   }, intptr.zero);    return windowhandle; }  private static intptr findchildwindow(intptr hwnd, func<string, bool> comparetitle) {   intptr windowhandle = intptr.zero;   enumchildwindows(hwnd, (hchildwnd, lparam) =>   {     stringbuilder text = new stringbuilder(200);     getwindowtext(hchildwnd, text, 200);             if (comparetitle(text.tostring()))     {       windowhandle = hchildwnd;       return false;     }     return true;   }, intptr.zero);    return windowhandle; }