How to Use C# to Convert PowerPoint to Image

using System.IO; // Import System.IO namespace for file handling
using Microsoft.Office.Interop.PowerPoint; // Import Interop PowerPoint namespace

class Program
{
    static void Main(string[] args)
    {
        string pptFilePath = "demo.pptx"; // Path to your PowerPoint file
        string outputFolder = "output_images"; // Output folder path where images will be saved

        ConvertPptToImages(pptFilePath, outputFolder); // Convert PowerPoint slides to images
    }

    static void ConvertPptToImages(string pptFilePath, string outputFolder)
    {
        Application pptApplication = new Application(); // Create a new PowerPoint application instance
        Presentation pptPresentation = pptApplication.Presentations.Open(pptFilePath, MsoTriState.msoFalse, MsoTriState.msoFalse, MsoTriState.msoFalse); // Open the PowerPoint presentation

        if (!Directory.Exists(outputFolder)) // Check if the output folder exists
            Directory.CreateDirectory(outputFolder); // Create the output folder if it doesn't exist

        int slidesCount = pptPresentation.Slides.Count; // Get the number of slides in the presentation

        for (int i = 1; i <= slidesCount; i++) // Iterate through all slides
        {
            string outputPath = Path.Combine(outputFolder, $"Slide{i}.png"); // Set the output path for the current slide
            pptPresentation.Slides[i].Export(outputPath, "png", 1024, 768); // Export slide to PNG format
        }

        pptPresentation.Close(); // Close the PowerPoint presentation
        pptApplication.Quit(); // Quit the PowerPoint application
    }
}

Imports System.IO ' Import System.IO namespace for file handling
Imports Microsoft.Office.Interop.PowerPoint ' Import Interop PowerPoint namespace

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		Dim pptFilePath As String = "demo.pptx" ' Path to your PowerPoint file
		Dim outputFolder As String = "output_images" ' Output folder path where images will be saved

		ConvertPptToImages(pptFilePath, outputFolder) ' Convert PowerPoint slides to images
	End Sub

	Private Shared Sub ConvertPptToImages(ByVal pptFilePath As String, ByVal outputFolder As String)
		Dim pptApplication As New Application() ' Create a new PowerPoint application instance
		Dim pptPresentation As Presentation = pptApplication.Presentations.Open(pptFilePath, MsoTriState.msoFalse, MsoTriState.msoFalse, MsoTriState.msoFalse) ' Open the PowerPoint presentation

		If Not Directory.Exists(outputFolder) Then ' Check if the output folder exists
			Directory.CreateDirectory(outputFolder) ' Create the output folder if it doesn't exist
		End If

		Dim slidesCount As Integer = pptPresentation.Slides.Count ' Get the number of slides in the presentation

		For i As Integer = 1 To slidesCount ' Iterate through all slides
			Dim outputPath As String = Path.Combine(outputFolder, $"Slide{i}.png") ' Set the output path for the current slide
			pptPresentation.Slides(i).Export(outputPath, "png", 1024, 768) ' Export slide to PNG format
		Next i

		pptPresentation.Close() ' Close the PowerPoint presentation
		pptApplication.Quit() ' Quit the PowerPoint application
	End Sub
End Class