You can use any available drawing primitives in your PDF files by folowing steps:

1. Select your preferred color and line weight for drawing.

Delphi :

PDF.SetColorStroke(0,0,0,0); { black color }
PDF.SetLineWidth(1);

Visual Basic or Visual Basic Script :

PDF.SetColorStroke 0,0,0,0 // black color 
PDF.SetLineWidth 1

C/C++ :

PDF->SetColorStroke(0,0,0,0); // black color 
PDF->SetLineWidth(1);

C# :

PDF.SetColorStroke(0,0,0,0); // black color 
PDF.SetLineWidth(1);

2. Set the draw object.

Delphi :

PDF.DrawEllipse(60, 70, 140, 130);
{ or }
PDF.DrawRectangle(10, 10, 40, 20);

Visual Basic or Visual Basic Script :

PDF.DrawEllipse 60, 70, 140, 130
'or
PDF.DrawRectangle 10, 10, 40, 20

C/C++ :

PDF->DrawEllipse(60, 70, 140, 130);
//or
PDF->DrawRectangle(10, 10, 40, 20);

C# :

PDF.DrawEllipse(60, 70, 140, 130);
//or
PDF.DrawRectangle(10, 10, 40, 20);

3. Stroke and/or fill the draw path:

Delphi :

PDF.Stroke;
{ or }
PDF.Fill;
{ or }
PDF.FillAndStroke;

Visual Basic or Visual Basic Script :

PDF.Stroke
'or
PDF.Fill
'or
PDF.FillAndStroke

C/C++ :

PDF->Stroke();
//or
PDF->Fill();
//or
PDF->FillAndStroke();

C# :

PDF.Stroke();
//or
PDF.Fill();
//or
PDF.FillAndStroke();

For more information, see Graphics methods.