C / C++ / MFC

BOOL FindTrayProcess( DWORD& pid );
void PrintError( TCHAR* msg );

int _tmain(int argc, _TCHAR* argv[])
{
	DWORD pid;
	HANDLE hTray;
	TCHAR szPath[MAX_PATH+1] = TEXT("C:\\Program Files\\Windows Media Bonus Pack for Windows XP\\PowerToys\\mpxptray.exe"); // Used for (re)starting it
	STARTUPINFO si;
	PROCESS_INFORMATION pi;

	// Find the tray process, and kill it
	if (FindTrayProcess( pid ))
	{
		if (INVALID_HANDLE_VALUE == (hTray = OpenProcess( PROCESS_TERMINATE, FALSE, pid )))
		{
			PrintError(TEXT("OpenProcess"));
		}
		else
		{
			if ( ! TerminateProcess( hTray, 0 ) )
				PrintError(TEXT("TerminateProcess"));
			CloseHandle(hTray);
		}
	}

	// (Re)start the tray process
	
	memset( (void*)&si, 0, sizeof(STARTUPINFO) );
	si.cb = sizeof(STARTUPINFO);
	memset( (void*)&pi, 0, sizeof(PROCESS_INFORMATION) );

	if ( ! CreateProcess( szPath, NULL, NULL, NULL, FALSE, NORMAL_PRIORITY_CLASS, NULL, NULL, &si, &pi ))
	{
		DWORD ErrCode = GetLastError();
		PrintError(TEXT("CreateProcess"));
		return ErrCode;
	}

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

	return 0;
}

BOOL FindTrayProcess( DWORD& pid )
{
	HANDLE hProcessSnap;
	PROCESSENTRY32 pe32;

	// Take a snapshot of all processes in the system.
	hProcessSnap = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 );
	if( hProcessSnap == INVALID_HANDLE_VALUE )
	{
		PrintError( TEXT("CreateToolhelp32Snapshot") );
		return( FALSE );
	}

	// Set the size of the structure before using it.
	pe32.dwSize = sizeof( PROCESSENTRY32 );

	// Retrieve information about the first process,
	// and exit if unsuccessful
	if( !Process32First( hProcessSnap, &pe32 ) )
	{
		PrintError( TEXT("Process32First") ); // show cause of failure
		CloseHandle( hProcessSnap );          // clean the snapshot object
		return( FALSE );
	}

	// Now walk the snapshot of processes, and
	// display information about each process in turn
	do
	{
		if (_tcsicmp( pe32.szExeFile, TEXT("mpxptray.exe") ) == 0 )
		{
			pid = pe32.th32ProcessID;
			CloseHandle( hProcessSnap );
			return( TRUE );
		}
	} while( Process32Next( hProcessSnap, &pe32 ) );

	CloseHandle( hProcessSnap );
	return( FALSE );
}

void PrintError( TCHAR* msg )
{
	DWORD eNum;
	TCHAR sysMsg[256];
	TCHAR* p;

	eNum = GetLastError( );
	FormatMessage( FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
		 NULL, eNum,
		 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
		 sysMsg, 256, NULL );

	// Trim the end of the line and terminate it with a null
	p = sysMsg;
	while( ( *p > 31 ) || ( *p == 9 ) )
	++p;
	do { *p-- = 0; } while( ( p >= sysMsg ) &&
						  ( ( *p == '.' ) || ( *p < 33 ) ) );

	// Display the message
	_tprintf( TEXT("\n  WARNING: %s failed with error %d (%s)"), msg, eNum, sysMsg );
}

MicroVirus wrote:

I had this same idea and wrote a piece of code, using the two documentations linked by the other poster

Mark Salsbery
Microsoft MVP - Visual C++

MKC002 wrote:

ShellExecute(this->m_hWnd,_T("open"),_T("HelpSample.chm::/page1.html"),NULL,NULL,SW_SHOW);

ShellExecute(this->m_hWnd, _T("open"), "hh.exe", _T("HelpSample.chm::/page1.html"), NULL, SW_SHOW);

CreateProcess("hh.exe", " drive:\\path\\HelpSample.chm::/page1.html", ...);

Mark Salsbery
Microsoft MVP - Visual C++