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testing a program is runningI'm writing my installer which, of course, is a win32 app (no .NET)
I would like to test tthe program is already running (in case of reinstall/upgrade) and prompt the user to stop the application. How do I do that? Basically I would like somthing like Process.GetProcessByName() but with win32 calls. Any idea? "Lloyd Dupont" <net.galador@ld> wrote in message You need a sentinel of some kind - something whose existence indicates your news:%23ewagSDBGHA.4084@TK2MSFTNGP12.phx.gbl... > I'm writing my installer which, of course, is a win32 app (no .NET) > I would like to test tthe program is already running (in case of > reinstall/upgrade) and prompt the user to stop the application. > > How do I do that? application's presence. Some applications look for windows often by class name - say one generated by the likes of GUIDGEN.EXE. Others might look for a similarly named mutex, registry key, whatever. Regards, Will "Lloyd Dupont" <net.galador@ld> wrote As Will has already pointed out there might be better ways to achieve what> I'm writing my installer which, of course, is a win32 app (no .NET) > I would like to test tthe program is already running (in case of > reinstall/upgrade) and prompt the user to stop the application. > > How do I do that? > > Basically I would like somthing like Process.GetProcessByName() but with > win32 calls. you want. But if you really insist on Win32 equivalent for the .NET API you might want to take a look at - Toolhelp (this is a bit fragile but works on down-level platforms) s. Process32First et. al. - PSAPI s. EnumProcesses - NtQuerySystemInformation -hg Win32 is required, it will be an InnoSetup installer function...
I did it like that: ===================================== __declspec( dllexport ) int __stdcall IsRunning(char procName[]) { DWORD processes[4048], i, num; if ( !EnumProcesses( processes, sizeof(processes), &num ) ) return 0; num = num / sizeof(DWORD); for(i=0; i<num; i++) { HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, processes[i] ); if( !hProcess ) continue; HMODULE hMod; DWORD tmp; BOOL found = FALSE; if ( EnumProcessModules( hProcess, &hMod, sizeof(hMod), &tmp) ) { TCHAR thisName[MAX_PATH]; GetModuleBaseName( hProcess, hMod, thisName, sizeof(thisName)/sizeof(TCHAR) ); found = _tcscmp(thisName, procName) ? FALSE : TRUE; } CloseHandle( hProcess ); if(found) return TRUE; } return FALSE; } ===================================== -- Show quoteRegards, Lloyd Dupont NovaMind development team NovaMind Software Mind Mapping Software <www.nova-mind.com> "Holger Grund" <holger.gr***@remove.ix-n.net> wrote in message news:uyftfGEBGHA.2356@tk2msftngp13.phx.gbl... > "Lloyd Dupont" <net.galador@ld> wrote >> I'm writing my installer which, of course, is a win32 app (no .NET) >> I would like to test tthe program is already running (in case of >> reinstall/upgrade) and prompt the user to stop the application. >> >> How do I do that? >> >> Basically I would like somthing like Process.GetProcessByName() but with >> win32 calls. > > As Will has already pointed out there might be better ways to achieve what > you want. But if you really insist on Win32 equivalent for the .NET API > you might want to take a look at > - Toolhelp (this is a bit fragile but works on down-level platforms) > s. Process32First et. al. > - PSAPI > s. EnumProcesses > - NtQuerySystemInformation > > -hg > This is risky, if another application uses the same executable name.
-- Show quoteRegards, Nish [VC++ MVP] "Lloyd Dupont" <net.galador@ld> wrote in message news:eQwCDRFBGHA.2512@TK2MSFTNGP09.phx.gbl... > Win32 is required, it will be an InnoSetup installer function... > I did it like that: > ===================================== > __declspec( dllexport ) int __stdcall IsRunning(char procName[]) > { > DWORD processes[4048], i, num; > if ( !EnumProcesses( processes, sizeof(processes), &num ) ) > return 0; > > num = num / sizeof(DWORD); > for(i=0; i<num; i++) > { > HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION | > PROCESS_VM_READ, > FALSE, processes[i] ); > if( !hProcess ) > continue; > > HMODULE hMod; > DWORD tmp; > BOOL found = FALSE; > if ( EnumProcessModules( hProcess, &hMod, sizeof(hMod), &tmp) ) > { > TCHAR thisName[MAX_PATH]; > GetModuleBaseName( hProcess, hMod, thisName, > sizeof(thisName)/sizeof(TCHAR) ); > found = _tcscmp(thisName, procName) ? FALSE : TRUE; > } > CloseHandle( hProcess ); > > if(found) > return TRUE; > } > return FALSE; > } > ===================================== > > -- > Regards, > Lloyd Dupont > > NovaMind development team > NovaMind Software > Mind Mapping Software > <www.nova-mind.com> > "Holger Grund" <holger.gr***@remove.ix-n.net> wrote in message > news:uyftfGEBGHA.2356@tk2msftngp13.phx.gbl... >> "Lloyd Dupont" <net.galador@ld> wrote >>> I'm writing my installer which, of course, is a win32 app (no .NET) >>> I would like to test tthe program is already running (in case of >>> reinstall/upgrade) and prompt the user to stop the application. >>> >>> How do I do that? >>> >>> Basically I would like somthing like Process.GetProcessByName() but with >>> win32 calls. >> >> As Will has already pointed out there might be better ways to achieve >> what >> you want. But if you really insist on Win32 equivalent for the .NET API >> you might want to take a look at >> - Toolhelp (this is a bit fragile but works on down-level platforms) >> s. Process32First et. al. >> - PSAPI >> s. EnumProcesses >> - NtQuerySystemInformation >> >> -hg >> > > in my case:
1. Mutex name collision would be just as likely, wouldn't they? 2. it's not a 8 letters word (it's "NovaMindEditor.exe") 3. who cares! it's just to popup a message box: "please leave $(APPLICATION) before continuing" -- Show quoteRegards, Lloyd Dupont NovaMind development team NovaMind Software Mind Mapping Software <www.nova-mind.com> "Nishant Sivakumar" <nish@nospam.asianetindia.com> wrote in message news:ePbbeKLBGHA.976@TK2MSFTNGP15.phx.gbl... > This is risky, if another application uses the same executable name. > > -- > Regards, > Nish [VC++ MVP] > > > "Lloyd Dupont" <net.galador@ld> wrote in message > news:eQwCDRFBGHA.2512@TK2MSFTNGP09.phx.gbl... >> Win32 is required, it will be an InnoSetup installer function... >> I did it like that: >> ===================================== >> __declspec( dllexport ) int __stdcall IsRunning(char procName[]) >> { >> DWORD processes[4048], i, num; >> if ( !EnumProcesses( processes, sizeof(processes), &num ) ) >> return 0; >> >> num = num / sizeof(DWORD); >> for(i=0; i<num; i++) >> { >> HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION | >> PROCESS_VM_READ, >> FALSE, processes[i] ); >> if( !hProcess ) >> continue; >> >> HMODULE hMod; >> DWORD tmp; >> BOOL found = FALSE; >> if ( EnumProcessModules( hProcess, &hMod, sizeof(hMod), &tmp) ) >> { >> TCHAR thisName[MAX_PATH]; >> GetModuleBaseName( hProcess, hMod, thisName, >> sizeof(thisName)/sizeof(TCHAR) ); >> found = _tcscmp(thisName, procName) ? FALSE : TRUE; >> } >> CloseHandle( hProcess ); >> >> if(found) >> return TRUE; >> } >> return FALSE; >> } >> ===================================== >> >> -- >> Regards, >> Lloyd Dupont >> >> NovaMind development team >> NovaMind Software >> Mind Mapping Software >> <www.nova-mind.com> >> "Holger Grund" <holger.gr***@remove.ix-n.net> wrote in message >> news:uyftfGEBGHA.2356@tk2msftngp13.phx.gbl... >>> "Lloyd Dupont" <net.galador@ld> wrote >>>> I'm writing my installer which, of course, is a win32 app (no .NET) >>>> I would like to test tthe program is already running (in case of >>>> reinstall/upgrade) and prompt the user to stop the application. >>>> >>>> How do I do that? >>>> >>>> Basically I would like somthing like Process.GetProcessByName() but >>>> with win32 calls. >>> >>> As Will has already pointed out there might be better ways to achieve >>> what >>> you want. But if you really insist on Win32 equivalent for the .NET API >>> you might want to take a look at >>> - Toolhelp (this is a bit fragile but works on down-level platforms) >>> s. Process32First et. al. >>> - PSAPI >>> s. EnumProcesses >>> - NtQuerySystemInformation >>> >>> -hg >>> >> >> > > "Lloyd Dupont" <net.galador@ld> wrote in message Well, maybe. :-)news:OeNaGzPBGHA.2356@tk2msftngp13.phx.gbl... > in my case: > 1. Mutex name collision would be just as likely, wouldn't they? Go to the bin\ subdirectory of the Platform SDK folder. Run GUIDGEN.EXE. Check radio button #4 - registry format. Click the "New Guid" and "Copy" buttons. Then copy the string from the clipboard into your application as a window class name, mutex name, registry key name whatever you like. The chance of a collision with someone else's name is vanishingly small. Regards, Will Lloyd Dupont wrote:
> Win32 is required, it will be an InnoSetup installer function... I'd consider Will's recommendation. Register a unique window class for > I did it like that: your application, and simply use FindWindow to find it. Or you could use a named mutex with a unique name to check if the application is running or not, but it's not going to return the window handle. Tom  |
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