Returning icon handle to VCSharp

I have written a DLL using VC++ Express, in it I export the following function:

Nikhil Pereira

If you're using a global mouse hook, I'm assuming the window handle that of a window in another application If that's the case, most handles are application-specific. Retreiving a handle via a SendMessage call will get an application-specific handle. The HICON from the SHGetFileInfo should work.

Handles are usually just a pointer into the application's memory--which generally isn't accessible by other applications. You have to marshal the handle from one process to another. I don't know of any Platform SDK functions that would marshal an icon handle from one process to another. I think you'd have to spawn a thread in the source process to get the icon data and communicate it back to the other process. Not a trivial process.
Glenn Peterson
Ok, I removed everything except the code to get the icon via SHGetFileInfo and am getting the same results. Any ideas
Do Hoang Ha
What does your DllImport statement look like in your C# program. Also, how are you getting the myHwnd value
Labi

[DllImport("apihooks.dll", CharSet = CharSet.Auto,

CallingConvention = CallingConvention.StdCall)]

public static extern IntPtr GetWindowIcon(IntPtr hwnd, IntPtr hicon);
Returning icon handle to VCSharp