How we do it bold?

My program is in visual studio 2008 c++ form.
Here is my code:

// tabPage6
//
this->tabPage6->Controls->Add(this->button6);
this->tabPage6->Controls->Add(this->groupBox12);
this->tabPage6->Controls->Add(this->groupBox11);
this->tabPage6->Location = System::Drawing::Point(4, 64);
this->tabPage6->Name = L"tabPage6";
this->tabPage6->Padding = System::Windows::Forms::Padding(3);
this->tabPage6->Size = System::Drawing::Size(992, 648);
this->tabPage6->TabIndex = 5;
this->tabPage6->Text = L"Geothermal Power";
this->tabPage6->UseVisualStyleBackColor = true;

I want "Geothermal Power" to be bold and bigger size. How I can do it?

Thanks in advance,
Ectoras