C# WINDOWS FROM

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  Mukesh Nailwal8mo agoPosted Jan 1, 2026, 10:34 AM

  Accepted answer

  To fix this issue, you may try below method:

  • Open Windows Form in Design View

  • Right-click on Toolbox >Choose Items

  • Go to COM Components

  • Choose Adobe PDF Reader

  • Drag the control onto the form.

  VS will automatically create this: private AxAcroPDFLib.AxAcroPDF axAcroPDF1;

  Open Form1.Designer.cs and confirm these exist:

  private AxAcroPDFLib.AxAcroPDF axAcroPDF1;

  and inside InitializeComponent();

  this.axAcroPDF1 = new AxAcroPDFLib.AxAcroPDF();

  this.axAcroPDF1.Enabled = true;

  this.axAcroPDF1.Location = new System.Drawing.Point(12, 12);

  this.axAcroPDF1.Size = new System.Drawing.Size(600, 400);

  this.Controls.Add(this.axAcroPDF1);

  Use axAcroPDF1 only inside the same form class:

  private void Form1_Load(object sender, EventArgs e)

  {

  axAcroPDF1.LoadFile(@"C:\sample.pdf");

  }

  Ensure these references exist:

  • AxAcroPDFLib

  • Adobe Acrobat xx.x Type Library

  Add them via

  References >Add Reference >COM

  I hope this works for you.

  Thanks