Question

How can I add a reference of a COM DLL in my application?

I have tried to add kernel32.dll and user32.dll but these are not supporting..

Answer 1

You should not need to add a reference to either kernel32.dll or user32.dll. These DLLs are part of Windows and can be imported in your code without adding a reference. You do this using P/Invoke.

For example, to call the function SendMessage in user32.dll, you could use the following C# code:

[DllImport("user32.dll", CharSet = CharSet.Auto)]
static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);

For more information and code snippets for methods in these DLLs, check out the P/Invoke wiki.

EDIT: You may also check out this article from the MSDN magazine for more information about P/Invoking and specifically some of the author’s comments about style and best practices.