COMException (0x80040154): Class not registered when using AxAcroPDFLib

c# winforms comexception interopservices
Ansar Muhammad picture Ansar Muhammad · Oct 28, 2010 · Viewed 15.4k times · Source

I am getting following error when using AxAcroPDF

System.Runtime.InteropServices.COMException (0x80040154): Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))

The line which throws error is 

((System.ComponentModel.ISupportInitialize)(this.axAcroPDF1)).EndInit();

If anyone knows the solution please help

Answer

msergeant picture msergeant · Oct 28, 2010

I suspect that your ActiveX control is not registered.

In that case, you would need to call RegSvr32 on the *.ocx or *.dll file (I don't know which for AxAcroPDF).

This question is very similar to yours. They found that they weren't registered properly because it was a 64 bit target system. Make sure you use the right version of regsvr32 for the control. One is for 32 bit and one is for 64 bit.

Related questions

How do I make a textbox that only accepts numbers?

I have a windows forms app with a textbox control that I want to only accept integer values. In the past I've done this kind of validation by overloading the KeyPress event and just removing characters which didn't fit the …

Read More
ComboBox: Adding Text and Value to an Item (no Binding Source)

In C# WinApp, how can I add both Text and Value to the items of my ComboBox? I did a search and usually the answers are using "Binding to a source".. but in my case I do not have a …

Read More
How do I create a message box with "Yes", "No" choices and a DialogResult?

I want to make simple Yes/No choiced MessageBox, but I think it is nonsense to design a form for that. I thought I could use MessageBox, add buttons, etc. to accomplish this. It is simple, but since there is …

Read More