Using DLLImport

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I am trying to use GetWindowInfo function to get information about an external window. However I am completely new to using DLLImports. I have tried googling for a simple tutorial but they all assume knowledge I don't have. Can anyone point me to good tutorials on DLLs, or better yet provide me with a simple example of using GetWindowInfo.

Posted 29-Oct-10 0:30am

Neil Cross

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2 solutions

Solution 1

Hi,

here is a good site that has all the information needed by you:
http://www.pinvoke.net/default.aspx/user32.getwindow[^]

Posted 29-Oct-10 0:33am

JF2015

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Neil Cross 29-Oct-10 7:18am

It seems to be a good site but I'm still finding it very difficult. They don't have any examples of using the code. Do you know any sites that give examples. Thanks.

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**JF2015** · Accepted Answer · 2010-10-29T01:36:00

Ok,

here is the code that you need:

Declare the method:

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("user32.dll",SetLastError = true)]
static extern bool GetWindowInfo(IntPtr hwnd, ref WINDOWINFO pwi);

And then you can call the method in one of your functions / event handlers...

WINDOWINFO info = new WINDOWINFO();
info.cbSize = (uint)Marshal.SizeOf(info);
GetWindowInfo(Handle, ref info);