private void button1_Click(object sender, System.EventArgs e)
{
}
     

private void button1_Click(object sender, System.EventArgs e)
{
 ShowPresentation();
 GC.Collect();
}

private void ShowPresentation()
{
 String strTemplate, strPic;
 strTemplate =
   "C:\\Program Files\\Microsoft Office\\Templates\\Presentation Designs\\Blends.pot";
 strPic = "C:\\Windows\\Blue Lace 16.bmp";
 bool bAssistantOn;

 PowerPoint.Application objApp;
 PowerPoint.Presentations objPresSet;
 PowerPoint._Presentation objPres;
 PowerPoint.Slides objSlides;
 PowerPoint._Slide objSlide;
 PowerPoint.TextRange objTextRng;
 PowerPoint.Shapes objShapes;
 PowerPoint.Shape objShape;
 PowerPoint.SlideShowWindows objSSWs;
 PowerPoint.SlideShowTransition objSST;
 PowerPoint.SlideShowSettings objSSS;
 PowerPoint.SlideRange objSldRng;
 Graph.Chart objChart;

 //Create a new presentation based on a template.
 objApp = new PowerPoint.Application();
 objApp.Visible = MsoTriState.msoTrue;
 objPresSet = objApp.Presentations;
 objPres = objPresSet.Open(strTemplate,
  MsoTriState.msoFalse, MsoTriState.msoTrue, MsoTriState.msoTrue);
 objSlides = objPres.Slides;

 //Build Slide #1:
 //Add text to the slide, change the font and insert/position a
 //picture on the first slide.
 objSlide = objSlides.Add(1,PowerPoint.PpSlideLayout.ppLayoutTitleOnly);
 objTextRng = objSlide.Shapes[1].TextFrame.TextRange;
 objTextRng.Text = "My Sample Presentation";
 objTextRng.Font.Name = "Comic Sans MS";
 objTextRng.Font.Size = 48;
 objSlide.Shapes.AddPicture(strPic, MsoTriState.msoFalse, MsoTriState.msoTrue,
  150, 150, 500, 350);

 //Build Slide #2:
 //Add text to the slide title, format the text. Also add a chart to the
 //slide and change the chart type to a 3D pie chart.
 objSlide = objSlides.Add(2, PowerPoint.PpSlideLayout.ppLayoutTitleOnly);
 objTextRng = objSlide.Shapes[1].TextFrame.TextRange;
 objTextRng.Text = "My Chart";
 objTextRng.Font.Name = "Comic Sans MS";
 objTextRng.Font.Size = 48;
 objChart = (Graph.Chart) objSlide.Shapes.AddOLEObject(150,150,480,320,
  "MSGraph.Chart.8", "", MsoTriState.msoFalse, "", 0, "",
  MsoTriState.msoFalse).OLEFormat.Object;
 objChart.ChartType = Graph.XlChartType.xl3DPie;
 objChart.Legend.Position=Graph.XlLegendPosition.xlLegendPositionBottom;
 objChart.HasTitle = true;
 objChart.ChartTitle.Text = "Here it is...";

 //Build Slide #3:
 //Change the background color of this slide only. Add a text effect to the slide
 //and apply various color schemes and shadows to the text effect.
 objSlide = objSlides.Add(3, PowerPoint.PpSlideLayout.ppLayoutBlank);
 objSlide.FollowMasterBackground = MsoTriState.msoFalse;
 objShapes = objSlide.Shapes;
 objShape = objShapes.AddTextEffect(MsoPresetTextEffect.msoTextEffect27,
   "The End", "Impact", 96, MsoTriState.msoFalse, MsoTriState.msoFalse, 230, 200);

 //Modify the slide show transition settings for all 3 slides in
 //the presentation.
 int[] SlideIdx = new int[3];
 for(int i=0;i<3;i++) SlideIdx[i]=i+1;
 objSldRng = objSlides.Range(SlideIdx);
 objSST = objSldRng.SlideShowTransition;
 objSST.AdvanceOnTime = MsoTriState.msoTrue;
 objSST.AdvanceTime = 3;
 objSST.EntryEffect = PowerPoint.PpEntryEffect.ppEffectBoxOut;

 //Prevent Office Assistant from displaying alert messages:
 bAssistantOn = objApp.Assistant.On;
 objApp.Assistant.On = false;

 //Run the Slide show from slides 1 thru 3.
 objSSS = objPres.SlideShowSettings;
 objSSS.StartingSlide = 1;
 objSSS.EndingSlide = 3;
 objSSS.Run();

 //Wait for the slide show to end.
 objSSWs = objApp.SlideShowWindows;
 while(objSSWs.Count>=1) System.Threading.Thread.Sleep(100);

 //Reenable Office Assisant, if it was on:
 if(bAssistantOn)
 {
  objApp.Assistant.On = true;
  objApp.Assistant.Visible = false;
 }

 //Close the presentation without saving changes and quit PowerPoint.
 objPres.Close();
 objApp.Quit();
}
     

using Microsoft.Office.Core;
using PowerPoint = Microsoft.Office.Interop.PowerPoint;
using Graph = Microsoft.Office.Interop.Graph;
using System.Runtime.InteropServices;