PdfFocusCImageOptionsDpi Property

public int Dpi { get; set; }

Public Property Dpi As Integer
	Get
	Set

using System;
using System.IO;
using System.Collections;

namespace Sample
{
    class Sample
    {
        static void Main(string[] args)
        {

            string pdfPath = Path.GetFullPath(@"..\..\..\Excel.pdf");
            string imagePath = "Result.png";
                                  // Get your free 30-day key here:   
             // https://sautinsoft.com/start-for-free/

            SautinSoft.PdfFocus f = new SautinSoft.PdfFocus();

            f.OpenPdf(pdfPath);

            if (f.PageCount > 0)
            {
                //In most cases we recommend to set 200 dpi to decrease the image size and converting speed
                //Now set 300 dpi - very high quality
                f.ImageOptions.Dpi = 300;

                //Convert 1st page from PDF to image file
                if (f.ToImage(imagePath, 1) == 0)
                {
                    // 0 - converting successfully                
                    // 2 - can't create output file, check the output path
                    // 3 - converting failed
                    System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(imagePath) { UseShellExecute = true });
                }
            }        
        }
    }
}

Imports System
Imports System.IO
Imports System.Collections

Namespace Sample
    Friend Class Sample
        Shared Sub Main(ByVal args() As String)

            Dim pdfPath As String = Path.GetFullPath("..\..\..\Excel.pdf")
            Dim imagePath As String = "Result.png"
                                  ' Get your free 30-day key here:   
             ' https://sautinsoft.com/start-for-free/

            Dim f As New SautinSoft.PdfFocus()

            f.OpenPdf(pdfPath)

            If f.PageCount > 0 Then
                'In most cases we recommend to set 200 dpi to decrease the image size and converting speed
                'Now set 300 dpi - very high quality
                f.ImageOptions.Dpi = 300

                'Convert 1st page from PDF to image file
                If f.ToImage(imagePath, 1) = 0 Then
                    ' 0 - converting successfully                
                    ' 2 - can't create output file, check the output path
                    ' 3 - converting failed
                    System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(imagePath) With {.UseShellExecute = True})
                End If
            End If
        End Sub
    End Class
End Namespace