Accessing power point

deepender singla

15y6.8k.NET

Hi all

i am thinking to develop a software for powerpoint , in which slides can be changed through program , for example i opened my power point and slide show is running on it , how i can change slide up and down through a porgram , if i run that program at the instant of time when slide is running , plz give a detailed solution .

18 Replies

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Vulpes15y ago
Accepted answer
Here's some basic code to get you started.

Create a new Windows Forms project and add three buttons to it: btnLauch, btnNext and btnPrevious. Set the Enabled property of the last two buttons to false.

Set the Form's Topmost property to two.

Handle the Click events of the buttons and the FormClosed event of the Form by adding skeleton handlers from the VS Designer.

Then add the following code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using System.Runtime.InteropServices;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
[DllImport("user32.dll")]
static extern bool SetForegroundWindow(IntPtr hWnd);

private Process p;

private string fileName = @"whatever.pptx"; // insert your Powerpoint file name here

public Form1()
{
InitializeComponent();
}

private void btnLaunch_Click(object sender, EventArgs e)
{
// launch Powerpoint slide show
p = Process.Start(fileName);
btnNext.Enabled = true;
btnPrevious.Enabled = true;
btnLaunch.Enabled = false;
}

private void btnNext_Click(object sender, EventArgs e)
{
SetForegroundWindow(p.MainWindowHandle);
p.WaitForInputIdle();
SendKeys.Send("{PGDN}");
}

private void btnPrevious_Click(object sender, EventArgs e)
{
SetForegroundWindow(p.MainWindowHandle);
p.WaitForInputIdle();
SendKeys.Send("{PGUP}");
}

private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
p.CloseMainWindow();
p.Dispose();
}
}
}
deepender singla15y ago
thanks it works with a little bit modification...
Vulpes15y ago
You'll need to make the following changes:

1. Add a textbox to your application (textBox1 say) so the user can enter the word (s)he wants to use to launch Powerpoint and precede it with a suitable label.

2. You'll also need to add another button (btnSave say) and add a Click handler for it, so the user can save the word typed in.

3. btnLaunch's Enabled property should now be set initially to false as you'll need to wait for the word to be typed in before accepting any manual or voice commands.

4. Considerable changes will be needed to the code itself - I've tried to highlight them (again code untested so watch out for possible bugs!):

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Speech.Recognition;

namespace WindowsFormsApplication10
{
public partial class Form1 : Form
{
[DllImport("user32.dll")]
static extern bool SetForegroundWindow(IntPtr hWnd);

private Process p;
private SpeechRecognizer sr;
private string pptWord;

private string fileName = "F://Desktop//MICRO_-_lecture1.pptx"; // insert your Powerpoint file name here

public Form1()
{
InitializeComponent();
btnSave.Click += btnSave_Click;
btnLaunch.Click += btnLaunch_Click;
btnNext.Click += btnNext_Click;
btnPrevious.Click += btnPrevious_Click;
}

private void btnSave_Click(object sender, EventArgs e)
{
string word = textBox1.Text.Trim();
if (word == "")
{
MessageBox.Show("A word has not been entered yet");
textBox1.Focus();
return;
}

pptWord = word;

// Create a new SpeechRecognizer instance.
sr = new SpeechRecognizer();

// Create a simple grammar that recognizes pptWord, "next", "previous" or "close"
Choices commands = new Choices();

commands.Add(pptWord); // now uses word entered by user
commands.Add("next");
commands.Add("previous");
commands.Add("close");

GrammarBuilder gb = new GrammarBuilder();
gb.Append(commands);

// Create the actual Grammar instance, and then load it into the speech recognizer.
Grammar g = new Grammar(gb);
sr.LoadGrammar(g);

// Register a handler for the SpeechRecognized event.
sr.SpeechRecognized += new EventHandler(sr_SpeechRecognized);

btnSave.Enabled = false;
btnLaunch.Enabled = true;
}

private void btnLaunch_Click(object sender, EventArgs e)
{
// launch Powerpoint slide show
p = Process.Start(fileName);
btnNext.Enabled = true;
btnPrevious.Enabled = true;
btnLaunch.Enabled = false;
}

private void btnNext_Click(object sender, EventArgs e)
{
SetForegroundWindow(p.MainWindowHandle);
p.WaitForInputIdle();
SendKeys.Send("{PGDN}");
}

private void btnPrevious_Click(object sender, EventArgs e)
{
SetForegroundWindow(p.MainWindowHandle);
p.WaitForInputIdle();
SendKeys.Send("{PGUP}");
}

private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
p.CloseMainWindow();
p.Dispose();
}

private void Form1_Load(object sender, EventArgs e)
{
// code now removed from here to btnSave_Click eventhandler
}

// Simple handler for the SpeechRecognized event.
private void sr_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
{
if (e.Result.Text == pptWord)
{
if (btnLaunch.Enabled) btnLaunch.PerformClick();
}
else
{
switch(e.Result.Text)
{
case "next" :

if (btnNext.Enabled) btnNext.PerformClick();
break;

case "previous" :

if (btnPrevious.Enabled) btnPrevious.PerformClick();
break;

case "close" :

this.Close();
break;

default:

break;
}
}
}

}

}
deepender singla15y ago
it works fine sir , can you help a little bit more instead of entering ppt in my code myself i want user enter to that string , how i can modify that in my code?
Vulpes15y ago
I'd include elements of the first program in the second.

You'll need to add a reference to System.Speech.dll to the second program and then add the code which I've highlighted below (untested so there may be bugs):

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Speech.Recognition;

namespace WindowsFormsApplication10
{
public partial class Form1 : Form
{
[DllImport("user32.dll")]
static extern bool SetForegroundWindow(IntPtr hWnd);

private Process p;
private SpeechRecognizer sr;

private string fileName = "F://Desktop//MICRO_-_lecture1.pptx"; // insert your Powerpoint file name here

public Form1()
{
InitializeComponent();
btnLaunch.Click += btnLaunch_Click;
btnNext.Click += btnNext_Click;
btnPrevious.Click += btnPrevious_Click;
}

private void btnLaunch_Click(object sender, EventArgs e)
{
// launch Powerpoint slide show
p = Process.Start(fileName);
btnNext.Enabled = true;
btnPrevious.Enabled = true;
btnLaunch.Enabled = false;
}

private void btnNext_Click(object sender, EventArgs e)
{
SetForegroundWindow(p.MainWindowHandle);
p.WaitForInputIdle();
SendKeys.Send("{PGDN}");
}

private void btnPrevious_Click(object sender, EventArgs e)
{
SetForegroundWindow(p.MainWindowHandle);
p.WaitForInputIdle();
SendKeys.Send("{PGUP}");
}

private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
p.CloseMainWindow();
p.Dispose();
}

private void Form1_Load(object sender, EventArgs e)
{
// Create a new SpeechRecognizer instance.
sr = new SpeechRecognizer();

// Create a simple grammar that recognizes "ppt", "next", "previous" or "close"
Choices commands = new Choices();

commands.Add("ppt");
commands.Add("next");
commands.Add("previous");
commands.Add("close");

GrammarBuilder gb = new GrammarBuilder();
gb.Append(commands);

// Create the actual Grammar instance, and then load it into the speech recognizer.
Grammar g = new Grammar(gb);
sr.LoadGrammar(g);

// Register a handler for the SpeechRecognized event.
sr.SpeechRecognized += new EventHandler(sr_SpeechRecognized);
}

// Simple handler for the SpeechRecognized event.
private void sr_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
{
switch(e.Result.Text)
{
case "ppt" :

if (btnLaunch.Enabled) btnLaunch.PerformClick();
break;

case "next" :

if (btnNext.Enabled) btnNext.PerformClick();
break;

case "previous" :

if (btnPrevious.Enabled) btnPrevious.PerformClick();
break;

case "close" :

this.Close();
break;

default:

break;
}
}

}

}
deepender singla15y ago
now in final task i have two programs one is this which is speech controlled:
using Microsoft.VisualBasic;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Speech.Recognition;
using System.ComponentModel;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{

public Form1()
{
InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)
{
//
// Create a new SpeechRecognizer instance.
sr = new SpeechRecognizer();


// Create a simple grammar that recognizes "red", "green", or "blue".
Choices colors = new Choices();

colors.Add("ppt");
colors.Add("Send");



GrammarBuilder gb = new GrammarBuilder();
gb.Append(colors);

// private string command = "#";

// Create the actual Grammar instance, and then load it into the speech recognizer.
Grammar g = new Grammar(gb);
sr.LoadGrammar(g);

// Register a handler for the SpeechRecognized event.
sr.SpeechRecognized += new EventHandler(sr_SpeechRecognized);

}



// Simple handler for the SpeechRecognized event.
private void sr_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
{
if (e.Result.Text == "ppt")
{
Process.Start("F://Desktop//MICRO_-_lecture1.pptx");
Thread.Sleep(2000);
// SendKeys.Send(" ");

}

private SpeechRecognizer sr;

}
}



when i run this program and when i say ppt ppt gets open now i want that when i say next , next ppt comes and when i say previous previous ppt comes and my second program in which i am controlling through ppt button is this:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using System.Runtime.InteropServices;

namespace WindowsFormsApplication10
{
public partial class Form1 : Form
{
[DllImport("user32.dll")]
static extern bool SetForegroundWindow(IntPtr hWnd);

private Process p;

private string fileName = "F://Desktop//MICRO_-_lecture1.pptx"; // insert your Powerpoint file name here

public Form1()
{
InitializeComponent();
btnLaunch.Click += btnLaunch_Click;
btnNext.Click += btnNext_Click;
btnPrevious.Click += btnPrevious_Click;
}

private void btnLaunch_Click(object sender, EventArgs e)
{
// launch Powerpoint slide show
p = Process.Start(fileName);
btnNext.Enabled = true;
btnPrevious.Enabled = true;
btnLaunch.Enabled = false;
}

private void btnNext_Click(object sender, EventArgs e)
{
SetForegroundWindow(p.MainWindowHandle);
p.WaitForInputIdle();
SendKeys.Send("{PGDN}");
}

private void btnPrevious_Click(object sender, EventArgs e)
{
SetForegroundWindow(p.MainWindowHandle);
p.WaitForInputIdle();
SendKeys.Send("{PGUP}");
}

private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
p.CloseMainWindow();
p.Dispose();
}

private void Form1_Load(object sender, EventArgs e)
{

}
}
}
how i can combine both program ?
Vulpes15y ago
Did you remember to add the three button click eventhandler skeletons from the VS designer? If you didn't then the events won't be wired up to the handlers.

However, you can still do it manually by adding the three highlighted lines to the constructor:

public Form1()
{
InitializeComponent();
btnLaunch.Click += btnLaunch_Click;
btnNext.Click += btnNext_Click;
btnPrevious.Click += btnPrevious_Click;
}
deepender singla15y ago
i have made changes code is running no with no error but it is not opening any ppt , when code runs only launch button come and when i click on it it is not opening any ppt., what should i do?
Vulpes15y ago
It might be easier to start again with a new project.

Don't just copy my code blindly but slot it into the form template which is generated for you.
deepender singla15y ago
if i change it to windowsformapplication8 then it is showing many error near to 23 , but when i keep it windowsformapplication1 now it is showing this error:
Error1'WindowsFormsApplication8.Form1.Dispose(bool)': no suitable method found to overridee:\documents\visual studio 2010\Projects\WindowsFormsApplication8\WindowsFormsApplication8\Form1.Designer.cs1433WindowsFormsApplication8
Vulpes15y ago
In the code I posted, try changing the namespace to: WindowsFormsApplication8
deepender singla15y ago
the windowsformapplication8 is project name and name of main form is form1.
Vulpes15y ago
What is the name of your main form, the one that appears when the project starts?
deepender singla15y ago
i have made changes those error are gone now i getting this error in program.cs file:
Error1The type or namespace name 'Form1' could not be found (are you missing a using directive or an assembly reference?)e:\documents\visual studio 2010\Projects\WindowsFormsApplication8\WindowsFormsApplication8\Program.cs1833WindowsFormsApplication8
Vulpes15y ago
The important thing is to change the Name properties of the buttons (not the Text property) to btnLaunch, btnNext and btnPrevious otherwise they will have their default names of button1, button2 and button3 and the code I gave you will not compile.

You can set their Text properties to anything you like. Launch, Next and Previous was just a suggestion.
deepender singla15y ago
It is againn showing errors , what i did let , i first created a windows from project , then added 3 buttons to it , by clicking on them i change there text to btnNExt , btnPrevious, btnLaunch , also i make enabled property of btnNext and btnPrevious to false , then i click on button and set its topmost property to true , next i click on double click on form this open code for my form 1 , i added the above code here , and with this the above code was also added in buttons also, but after this it is not running it is showing same 3 error as before , what should i do plz see if there is problem in my approach,
Vulpes15y ago
In the Visual Studio Windows Forms designer, place three buttons on the form from the toolbox, change their names to btnLaunch, btnNext and btnPrevious and their Text properties to (say) : Launch, Next and Previous.

Now double click on each of the buttons in turn which will generate a Click eventhandler for them.

Next, click anywhere on the form and change its Topmost property to True in the Properties Box.

Then switch to events in the Properties Box for the form (lightning bolt symbol), select the FormClosed event and double click it to open up a skeleton eventhandler.

Finally, add the code in my last post in the appropriate places in the form, build and run.

Incidentally, I wouldn't call your program Powerpoint - I'd call it something else such as PowerpointController to distinguish it from the Microsoft executable.
deepender singla15y ago
hello sir for your prompt reply , there is delay from my side i was struck somewhere sorry for that. when i implemented ur slution i am not able to this statement "Handle the Click events of the buttons and the FormClosed event of the Form by adding skeleton handlers from the VS Designer." before this implemten it and after this i pasted code in form it is showing these error:

Error2The name 'btnPrevious' does not exist in the current contexte:\documents\visual studio 2010\Projects\powerpoint\powerpoint\Form1.cs3413powerpoint
Error1The name 'btnNext' does not exist in the current contexte:\documents\visual studio 2010\Projects\powerpoint\powerpoint\Form1.cs3313powerpoint
Error3The name 'btnLaunch' does not exist in the current contexte:\documents\visual studio 2010\Projects\powerpoint\powerpoint\Form1.cs3513powerpoint

what shoud i do?