[nicocer]

Hola amigos, aca les mando el codigo q me funciona, espero q les sirva...

Nicocer.....el q se auto-contesta

Graphics::TBitmap *bmp = new Graphics::TBitmap;
TreeView1->Width=TreeView1->Width+500;
TreeView1->Height=TreeView1->Height+500;
 bmp->Width = TreeView1->Width;
  bmp->Height = TreeView1->Height;
  bmp->Canvas->Lock();

 TreeView1->Perform(WM_PRINT,(int)bmp->Canvas->Handle, PRF_CLIENT );
   bmp->SaveToFile("c:/dibujo.bmp");
TreeView1->Width=TreeView1->Width-500;
TreeView1->Height=TreeView1->Height-500;
bmp->Free();