Delphi Get the handle of a EXE

Question

Heres an example of how I'm doing it right now :

var
Client : String;
Handle : Integer;
begin
Client := 'Window Name';
GetWindowThreadProcessId(FindWindow(nil, PAnsiChar(Client)), @ProcessId);
Handle := OpenProcess(PROCESS_ALL_ACCESS, False, ProcessId);
end;

I'd rather grab the Process's handle with its exe name... Is this possible this?

Answer 1

Since the link provided by vcldeveloper is broken, here's the full function code that works without 3rd party components.

First we will find process id (PID), and then we'll get process handle by opening all access (since the OP mentioned in the comments he will need this for ReadProcessMemory functionality).

If the function for PID returns 0, it means that the process is most likely not running (or just not found in the running process list)

function GetPIDbyProcessName(processName:String):integer;
var 
  GotProcess: Boolean; 
  tempHandle: tHandle; 
  procE: tProcessEntry32;
begin
  tempHandle:=CreateToolHelp32SnapShot(TH32CS_SNAPALL, 0); 
  procE.dwSize:=SizeOf(procE); 
  GotProcess:=Process32First(tempHandle, procE);
  {$B-} 
    if GotProcess and not SameText(procE.szExeFile, processName) then 
      repeat GotProcess := Process32Next(tempHandle, procE); 
      until (not GotProcess) or SameText(procE.szExeFile,processName); 
  {$B+}

  if GotProcess then 
    result := procE.th32ProcessID 
  else
    result := 0; // process not found in running process list

  CloseHandle(tempHandle);
end;

Next, we will get/open Process handle from the PID we got. The whole code/usage is as follows:

var myPID, myProcessHandle: integer;
begin
  myPID:=GetPIDbyProcessName('someExeName.exe');
  myProcessHandle:=OpenProcess(PROCESS_ALL_ACCESS,False,myPID);
end;

You should store the myProcessHandle in such way that it is accessable for
ReadProcessMemory(myProcessHandle...) as first parameter.

Also, add these to your global uses clauses:
Winapi.Windows (for ReadProcessMemory and OpenProcess)
Winapi.tlHelp32(for getting PID tProcessEntry32 variable)