Calling unmanaged code from managed code

[Guest]

How do i call unmanaged code(win32 api) from my C# application?

 

[Morten Wennevik]

Hi KL,

You use P/Invoke (Platform Invoke) with DllImport (found in
system.Runtime.InteropServices).

Win 32 API code

HWND FindWindow( LPCTSTR lpClassName, LPCTSTR lpWindowName);

To call this method put something like this in your code (C#)

[DllImport("user32.dll")]
public static extern int FindWindow(string lpClassName, string
lpWindowName);

There is more to DllImport that lets you rename the methodname and specify
unicode etc, but this is the basic way.

 

[Guest]

Don't know if I can point to one good article on PInvoke, but wrapping
unmanaged dlls has been covered in parts all over the net. Take a look at
this:
http://home.comcast.net/~victorhansonsmith/professional/writing_samples/thats_a_wrap.html

It get's you started. I have a lot of wrapping info (VB) on my weblog,
mkenyo2.blogspot.com

Also, try this:
http://msdn.microsoft.com/library/d.../html/cpconconsumingunmanageddllfunctions.asp