Solved

BlockInput not working on Windows 7

Posted on 2011-02-11
8
2,809 Views
Last Modified: 2012-05-11
Hi

I have a program in VB6 that use the BlockInput API, however on Windows 7 , that api doesn't work. I have searched on google and i found that.

But no solution is provided, do you have an alternate api to block the keyboard and mouse on Windows 7 ?

thank you very much !
Mariano.
0
Comment
Question by:kidspc
  • 4
  • 3
8 Comments
 
LVL 4

Accepted Solution

by:
HawyLem earned 500 total points
ID: 34875695
That requires administrative privileges on Win7
0
 

Author Comment

by:kidspc
ID: 34875732
we have done that, give administrative privileges to the accounts and nothing, we also used the Adminitrator account and didn't work
0
 
LVL 4

Expert Comment

by:HawyLem
ID: 34878388
The system will unblock input in the following cases:

The thread that blocked input unexpectedly exits without calling BlockInput with fBlock set to FALSE. In this case, the system cleans up properly and re-enables input.
The user presses CTRL+ALT+DEL or the system invokes the Hard System Error modal message box (for example, when a program faults or a device fails).

Is any of these your case?
0
Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

 
LVL 13

Expert Comment

by:5g6tdcv4
ID: 34878927
Try turning UAC off, for testing purposes only, and  see if your program works then turn UAC back on
0
 

Author Comment

by:kidspc
ID: 34890751
@HawyLem, no those are not our case.  We just try to block the computer and the api is called without the result we expect, only on Windows 7.  If we try to do that on XP, 98 or Vista it works perfectly.
0
 
LVL 4

Expert Comment

by:HawyLem
ID: 34894444
Return Value

Type: BOOL

If the function succeeds, the return value is nonzero.

If input is already blocked, the return value is zero. To get extended error information, call GetLastError.

Please check the return value to realize if the function has succeeded. Otherwise check the error
0
 

Author Comment

by:kidspc
ID: 34931036

thanks all of you for your opinions to resolve this.

HawyLem,  your last message give us a clue about what was wrong.  Your first answer was right, however due to some "if" the code was not runing to the BlockInput API.

So, thanks again for your help, i give the points to HawyLem.
0
 

Author Closing Comment

by:kidspc
ID: 34931042
in the way to check the return value of BlockInput API we discover why the function was not called
0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Whether you’re a college noob or a soon-to-be pro, these tips are sure to help you in your journey to becoming a programming ninja and stand out from the crowd.
A quick guide on how to use Group Policy to create a custom power plan and set it active on Windows 7.
The goal of the video will be to teach the user the concept of local variables and scope. An example of a locally defined variable will be given as well as an explanation of what scope is in C++. The local variable and concept of scope will be relat…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.

860 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question