[Marvel]

1. нужно использовать событие OnDrawColumnCell компонента TDBGrid (или какой там у вас):

Код:

procedure TAvtoknigaForm.DBGridPartDrawColumnCell(Sender: TObject;
  const Rect: TRect; DataCol: Integer; Column: TColumn;
  State: TGridDrawState);
var
  photofile: string;
begin
  photofile := IBMainPart.FieldByName('PHOTOFILE').AsString;
  
  if (Length(photofile) > 0) And (Not FileExists(photofile)) then
  begin
    DBGridPart.Canvas.Brush.Color := clRed;
    DBGridPart.Canvas.Font.Style := [];
    DBGridPart.Canvas.Font.Color := clWhite;
    DBGridPart.DefaultDrawColumnCell(Rect, DataCol, Column, State);
  end;

  if (Length(photofile) > 0) And (FileExists(photofile)) then
  begin
    DBGridPart.Canvas.Brush.Color := clSkyBlue;
    DBGridPart.Canvas.Font.Style := [];
    DBGridPart.Canvas.Font.Color := clBlack;
    DBGridPart.DefaultDrawColumnCell(Rect, DataCol, Column, State);
  end;

  if State = [gdFocused] then
  begin
    DBGridPart.Canvas.Brush.Color := clSilver;
    DBGridPart.Canvas.Font.Style := [fsBold];
    DBGridPart.Canvas.Font.Color := clBlack;
    DBGridPart.DefaultDrawColumnCell(Rect, DataCol, Column, State);
  end;

  if gdSelected in State then
  begin
    DBGridPart.Canvas.Brush.Color := clSilver;
    DBGridPart.Canvas.Font.Style := [fsBold];
    DBGridPart.Canvas.Font.Color := clBlack;
    DBGridPart.DefaultDrawColumnCell(Rect, DataCol, Column, State);
  end;
end;

2. В Uses нужно добавить ShellAPI и юзать ShellExecute. пример:

Код:

ShellExecute(Handle,'open','prog.exe','параметры запуска','директория запуска',SW_SHOWNORMAL);

либо

Код:

WinExec('prog.exe',SW_SHOWNORMAL);