function FindFirst(const FileName: String; var FindRec: TFindRec): Boolean;

Retrieves information about the first file matching the wildcard specified by FileName. Returns True if successful.

TFindRec is defined as:

  TFindRec = record
    Name: String;               // name of the found file (no path)
    Attributes: LongWord;       // file attributes
    SizeHigh: LongWord;         // size of the file, upper 32 bits
    SizeLow: LongWord;          // size of the file, lower 32 bits
    CreationTime: TFileTime;    // time file was created
    LastAccessTime: TFileTime;  // time file was last accessed
    LastWriteTime: TFileTime;   // time file was last modified
    AlternateName: String;      // file's short name (empty if none)
    FindHandle: THandle;        // used internally
  end;

TFileTime is defined as:

  TFileTime = record
    dwLowDateTime: DWORD;
    dwHighDateTime: DWORD;
  end;

Valid file attributes are:

  FILE_ATTRIBUTE_READONLY
  FILE_ATTRIBUTE_HIDDEN
  FILE_ATTRIBUTE_SYSTEM
  FILE_ATTRIBUTE_DIRECTORY
  FILE_ATTRIBUTE_ARCHIVE
  FILE_ATTRIBUTE_DEVICE
  FILE_ATTRIBUTE_NORMAL
  FILE_ATTRIBUTE_TEMPORARY
  FILE_ATTRIBUTE_SPARSE_FILE
  FILE_ATTRIBUTE_REPARSE_POINT
  FILE_ATTRIBUTE_COMPRESSED
  FILE_ATTRIBUTE_OFFLINE
  FILE_ATTRIBUTE_NOT_CONTENT_INDEXED
  FILE_ATTRIBUTE_ENCRYPTED

If FindFirst returns True, call FindNext to enumerate the rest of the files, and then FindClose.

The following example counts the number of files in the Windows System directory.

var
  FilesFound: Integer;
  FindRec: TFindRec;
begin
  FilesFound := 0;
  if FindFirst(ExpandConstant('{sys}\*'), FindRec) then begin
    try
      repeat
        // Don't count directories
        if FindRec.Attributes and FILE_ATTRIBUTE_DIRECTORY = 0 then
          FilesFound := FilesFound + 1;
      until not FindNext(FindRec);
    finally
      FindClose(FindRec);
    end;
  end;
  MsgBox(IntToStr(FilesFound) + ' files found in the System directory.',
    mbInformation, MB_OK);
end;

FindNext FindClose