C# : Power point slide show in Windows Application

This application will start Power point slide show in Windows Application.

Call the StartSlideShow function on button click or form_load.

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

private void StartSlideShow()
String strTemplate, strPic;
strTemplate =
"C:\\Program Files\\Microsoft Office\\Templates\\Presentation Designs\\"Select your templet"";
strPic = "C:\\local\\mypic.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, "",
objChart.ChartType = Graph.XlChartType.xl3DPie;
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;

//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:
objApp.Assistant.On = true;
objApp.Assistant.Visible = false;

//Close the presentation without saving changes and quit PowerPoint.

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