uses
 System.SysUtils, Winapi.Windows;

// ...

const MiniDumpNormal                          = $00000000;
      MiniDumpWithDataSegs                    = $00000001;
      MiniDumpWithFullMemory                  = $00000002;
      MiniDumpWithHandleData                  = $00000004;
      MiniDumpFilterMemory                    = $00000008;
      MiniDumpScanMemory                      = $00000010;
      MiniDumpWithUnloadedModules             = $00000020;
      MiniDumpWithIndirectlyReferencedMemory  = $00000040;
      MiniDumpFilterModulePaths               = $00000080;
      MiniDumpWithProcessThreadData           = $00000100;
      MiniDumpWithPrivateReadWriteMemory      = $00000200;
      MiniDumpWithoutOptionalData             = $00000400;
      MiniDumpWithFullMemoryInfo              = $00000800;
      MiniDumpWithThreadInfo                  = $00001000;
      MiniDumpWithCodeSegs                    = $00002000;
      MiniDumpWithoutAuxiliaryState           = $00004000;
      MiniDumpWithFullAuxiliaryState          = $00008000;
      MiniDumpWithPrivateWriteCopyMemory      = $00010000;
      MiniDumpIgnoreInaccessibleMemory        = $00020000;
      MiniDumpWithTokenInformation            = $00040000;
      MiniDumpWithModuleHeaders               = $00080000;
      MiniDumpFilterTriage                    = $00100000;
      MiniDumpWithAvxXStateContext            = $00200000;
      MiniDumpWithIptTrace                    = $00400000;
      MiniDumpScanInaccessiblePartialPages    = $00800000;
      MiniDumpFilterWriteCombinedMemory       = $01000000;
      MiniDumpValidTypeFlags                  = $01ffffff;

// ...

type
  MINIDUMP_EXCEPTION_INFORMATION = record
    ThreadId          : DWORD;
    ExceptionPointers : PExceptionPointers;
    ClientPointers    : BOOL;
  end;
  TMiniDumpExceptionInformation = MINIDUMP_EXCEPTION_INFORMATION;
  PMiniDumpExceptionInformation = ^TMiniDumpExceptionInformation;

  MINIDUMP_USER_STREAM = record
    Type_      : ULONG;
    BufferSize : ULONG;
    Buffer     : Pointer;
  end;
  TMiniDumpUserStream = MINIDUMP_USER_STREAM;
  PMiniDumpUserStream = ^TMiniDumpUserStream;

  MINIDUMP_USER_STREAM_INFORMATION = record
    UserStreamCount : ULONG;
    UserStreamArray : PMiniDumpUserStream;
  end;
  TMiniDumpUserStreamInformation = MINIDUMP_USER_STREAM_INFORMATION;
  PMiniDumpUserStreamInformation = ^TMiniDumpUserStreamInformation;

  TMiniDumpCallbackRoutine = function(
    CallbackParam      : Pointer;
    CallbackInput      : Pointer;
    var CallbackOutput : Pointer
  ): BOOL; stdcall;

  MINIDUMP_CALLBACK_INFORMATION = record
    CallbackRoutine : TMiniDumpCallbackRoutine;
    CallbackParam   : Pointer;
  end;
  TMiniDumpCallbackInformation = MINIDUMP_CALLBACK_INFORMATION;
  PMiniDumpCallbackInformation = ^TMiniDumpCallbackInformation;

// ...

function MiniDumpWriteDump(
  hProcess        : THandle;
  ProcessId       : DWORD;
  hFile           : THandle;
  DumpType        : DWORD;
  ExceptionParam  : PMiniDumpExceptionInformation;
  UserStreamParam : PMiniDumpUserStreamInformation;
  CallbackParam   : PMiniDumpCallbackInformation
) : BOOL; stdcall; external 'DbgHelp.dll';

// ...

procedure DumpProcessMemory(const ATargetProcessId : Cardinal; const AOutputPath : String);
begin
  var hProcess := OpenProcess(PROCESS_QUERY_INFORMATION or PROCESS_VM_READ, False, ATargetProcessId);
  if hProcess = 0 then
    raise EWindowsException.Create('OpenProcess');
  try
    var hFile := CreateFileW(PWideChar(AOutputPath), GENERIC_WRITE, 0, nil, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
    if hFile = INVALID_HANDLE_VALUE then
      raise EWindowsException.Create('CreateFileW');
    try
      // Adjust flags accordingly to suit dump detail requirements
      var AFlags := MiniDumpWithFullMemory or MiniDumpWithHandleData or
                    MiniDumpWithThreadInfo or MiniDumpWithProcessThreadData or
                    MiniDumpWithFullMemoryInfo or MiniDumpWithUnloadedModules or
                    MiniDumpWithFullAuxiliaryState or MiniDumpIgnoreInaccessibleMemory or
                    MiniDumpWithTokenInformation (* or ... *);

      if not MiniDumpWriteDump(hProcess, ATargetProcessId, hFile, AFlags, nil, nil, nil) then
        raise EWindowsException.Create('Error Message', GetLastError() and $FFFF (* HRESULT *));
    finally
      CloseHandle(hFile);
    end;
  finally
    CloseHandle(hProcess);
  end;
end;

// ...

begin
  try
    var AOutputFile := 'C:\Temp\process.dmp';

    DumpProcessMemory(<target_process_id>, AOutputFile);

    WriteLn('Done.');
  except
    on e : Exception do
      WriteLn(e.Message);
  end;

// ...

Depends On

• EWindowsException

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