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import user32.dll and use the 'BlockInput' function in it

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I am sending a series of keystrokes to the notepad application from Matlab and through the total process I would like to lock the user input form both keyboard and mouse till the process completes and then release the lock. I found that there is a function called 'BlockInput' MSDN function in 'user32.dll'. So I am trying to import this dll into Matlab and use the function but I am getting the following error when I am trying to load the dll using 'loadlibrary' command.
loadlibrary('"C:\WINDOWS\system32\user32.dll"','winuser'); Warning: The library class 'user32' already exists. Use a classname alias.
Any guidance is appreciated.
Thanks, Krishna.

Accepted Answer

Krishna on 3 Feb 2012
I created a dll in VB dotnet for the required function 'BlockInput'. I registered the created dll in Matlab using RegAsm.exe . Once I registered the dll in Matlab I created a COM component using 'actxserver' command. Then I could use the methods in the COM component and I got it working :) .

More Answers (5)

Krishna on 10 Jun 2011
Sorry about repeating the question.. I am getting 0.. I guess this means the library is not loaded..

Kaustubha Govind
Kaustubha Govind on 10 Jun 2011
loadlibrary user32 winuser.h
If you continue to see the same error, try:
loadlibrary user32 winuser.h alias user32lib
  1 Comment
Vishnu on 25 Jan 2015
Matlab removed my previous post, here is my new post with source code..
And to my knowledge the loadlibrary method I followed is undocumented...

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UT on 3 Feb 2012
Hi Krishna,
Did you find out what was the problem?

Ignacio on 23 Oct 2014
Hi Krishna, I would like to disable temporality my keyboard and mouse through Matlab and I would like to know how did you do that.
Could you please post your solution or somehow send it to me?

Vishnu on 21 Jan 2015


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