Question

I’m working on a project and I need to embed a PowerPoint viewer in windows forms. I’m using the following activeX control: http://www.daolnwod.com/free-powerpoint-viewer-activex.html.

I activated the control to be used with the form designer’s toolbox and dragged it into my form. I then edited the code in the InitializeComponent() method to the following:

this.axPowerPointViewer1 = new AxPOWERPOINTVIEWERLib.AxPowerPointViewer();

((System.ComponentModel.ISupportInitialize)(this.axPowerPointViewer1)).BeginInit();
this.axPowerPointViewer1.Enabled = true;
this.axPowerPointViewer1.Location = new System.Drawing.Point(0, 0);
this.axPowerPointViewer1.Name = "axPowerPointViewer1";
this.axPowerPointViewer1.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("axPowerPointViewer1.OcxState")));
this.axPowerPointViewer1.Size = new System.Drawing.Size(925, 573);
this.axPowerPointViewer1.TabIndex = 5;
//this.axPowerPointViewer1.CreateControl();
this.Controls.Add(this.axPowerPointViewer1);
((System.ComponentModel.ISupportInitialize)(this.axPowerPointViewer1)).EndInit();

And in my Forms constructor

public Form1()
{
    InitializeComponent();

    axPowerPointViewer1.Show();
    bool loaded = axPowerPointViewer1.LoadFile(@"C:\Debug\test2.ppt"); // loaded = false

    string z = axPowerPointViewer1.GetSlideCount().ToString();
}

However, when I’m opening the form nothing shows up. The code compiles but I can’t see my test slide that I’ve been working on. I have created 2 buttons for ‘Previous’ and ‘Next’ slides but debugging gives me a slide location of 0 every time so something must be wrong and I can’t seem to find it.

---

UPDATE

The problem has been solved. It seems I didn’t call axPowerPointviewer1.InitControl(). It still has a few troubles, sometimes it won’t display the first slide at startup. If things keep running smoothly I’ll post an answer to this problem.

Answer 1

The problem is in initialising the control. In order for the control to fully function you need to call the InitControl() method so call calling the following code should make the program work:

    private void Form1_Load(object sender, EventArgs e)
    {
        this.axPowerPointViewer1.InitControl();
    }