Rotating a TLatex object

Dear all

I am trying to Draw a TLatex object
at 90° wrt the X axis
I use the code :

TLatex* tex = new TLatex;
  tex = new TLatex(x1+0.02,y1+0.02,"excluded area has CL > 0.95");
  tex->SetTextSize(0.022);tex->RotateX(1.571);
  tex->SetTextAlign(23);tex->SetTextFont(42);tex->Draw();

But the RotateX function is not supported

Any idea on how to do this ?

regards
Vincent

tex->SetTextAngle(90);