How to check if a program is running, by its name, with Qt (C++).
Will QProcess::pid
do the job? I don't know how to use it. Please suggest.
As far as I know QProcess won't allow you to do that (unless you've spawned the process yourself) and in fact nothing in Qt will. However Win32 API provides a way to achieve what you want through EnumProcesses
function and a complete example of how to use it is provided at Microsoft website:
http://msdn.microsoft.com/en-us/library/ms682623.aspx
To get you need replace PrintProcessNameAndID with the following function:
bool matchProcessName( DWORD processID, std::string processName)
{
TCHAR szProcessName[MAX_PATH] = TEXT("<unknown>");
// Get a handle to the process.
HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION |
PROCESS_VM_READ,
FALSE, processID );
// Get the process name.
if (NULL != hProcess )
{
HMODULE hMod;
DWORD cbNeeded;
if ( EnumProcessModules( hProcess, &hMod, sizeof(hMod),
&cbNeeded) )
{
GetModuleBaseName( hProcess, hMod, szProcessName,
sizeof(szProcessName)/sizeof(TCHAR) );
}
}
// Compare process name with your string
bool matchFound = !_tcscmp(szProcessName, processName.c_str() );
// Release the handle to the process.
CloseHandle( hProcess );
return matchFound;
}