How to check process name help

[omarespanol]

Hello i will show the threads and process but i want to check a single process like notepad and show this only.
Complete code:

void PrintProcessNameAndID( DWORD processID )
{
    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) );
        }
    }

    // Print the process name and identifier.
    //_tprintf( TEXT("%s  (PID: %u)\n"), szProcessName, processID );

	if(szProcessName=="chrome.exe"){
		printf("\n");
	}
    // Release the handle to the process.

    CloseHandle( hProcess );
}

int main( void )
{
    // Get the list of process identifiers.

    DWORD aProcesses[1024], cbNeeded, cProcesses;
    unsigned int i;

    if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) )
    {
        return 1;
    }


    // Calculate how many process identifiers were returned.

    cProcesses = cbNeeded / sizeof(DWORD);

    // Print the name and process identifier for each process.

    for ( i = 0; i < cProcesses; i++ )
    {
        if( aProcesses[i] != 0 )
        {
            PrintProcessNameAndID( aProcesses[i] );
        }
    }

    return 0;
}

I want when szProcessName is notepad show it. But when i do this:

if(szProcessName=="notepad.exe"){
		printf("\n");
	}

Doesnt show me nothing why?? How i can check szProcessName with the name example notepad and show maybe szProcessName is not a string? When i do without checking obviously show me notepad.. in console.. and the other processes..

[Thomas1965]

To compare TCHAR[] you need to use _tcscmp, the operator == will only compare the pointers, not their values.
http://stackoverflow.com/questions/35302605/compare-tchar-and-values-from-a-tchar

Also worth reading:
https://www.codeproject.com/Articles/76252/What-are-TCHAR-WCHAR-LPSTR-LPWSTR-LPCTSTR-etc

[omarespanol]

I did this and worked.
(!lstrcmp(szProcessName,"notepad.exe"))

But i dont understand when i do !lstrcmp the ! doesnt mean false? or for what is used the exclamation in strcmp(comparing) which is the utilify of this exclamation????????

[mbozzi]

You could have found this out by looking up lstrcmp() in a reference.
https://msdn.microsoft.com/en-us/library/windows/desktop/ms647488(v=vs.85).aspx

! is operator NOT, i.e., boolean negation.

lstrcmp() returns 0 (boolean false) when the strings are equivalent. Otherwise it returns a positive or negative integer (boolean true) depending on whether the compared string is less or greater than (according to Windows' CompareString() function).

[omarespanol]

So well then because in my if must to be true to print the message so if are equivalent i negate and then i got true and at last will print the equivalents.. example:

if(!lstrcmp(szProcessName,"notepad.exe")){
    // print equivalents
   printf(szProcessName);
   printf("\n");
}

if they are equivalents then return false so i must to negate to be true. Other explication for this i dont have.

[Thomas1965]

Might be clearer to write the code like this:

const int EQUAL = 0;
if (lstrcmp(szProcessName,"notepad.exe") == EQUAL)
{
  printf(szProcessName);
  printf("\n");
}