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

Hi,

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.

[Kaustubha Govind]

What do you see when type:

libisloaded user32

Answer 1

[Krishna]

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 :) .

Answer 2

[Krishna]

Sorry about repeating the question.. I am getting 0.. I guess this means the library is not loaded..

Answer 3

[Kaustubha Govind]

Try:

addpath('C:\WINDOWS\system32\')
loadlibrary user32 winuser.h

If you continue to see the same error, try:

loadlibrary user32 winuser.h alias user32lib

[Vishnu]

Matlab removed my previous post, here is my new post with source code..

And to my knowledge the loadlibrary method I followed is undocumented...

http://www.mathworks.com/matlabcentral/fileexchange/49149

Answer 4

[UT]

Hi Krishna,

Did you find out what was the problem?

[Krishna]

I have my solution here. Let me know if you need more info.

Answer 5

[Ignacio]

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?

Thanks!

Answer 6

[Vishnu]

This works...

http://www.mathworks.com/matlabcentral/fileexchange/49110-user32-dll-find--show-and-select-window-functions-with-loadlibrary-user32-dll--in-one-class