Blocking Keyboard and Mouse Input

[wolfie78uk]

I was trying to block all keyboard and mouse input whilst running my VB application but was unable to do so with the API functions in VB.

This may be a horribly long winded way to do it (and I leave myself open to the mockery of the experienced programmers) but it works.

1)Open up Visual C++ and create a new Empty Win32DLL Project called BlockInput.
2)Add a C++ file (with a .cpp extension) to your project - call it "BlockInput.cpp"

In the .cpp file write :

void _stdcall BlockInput(bool State)
{

if (State == True)

BlockInput(True);

else

BlockInput(False);

};

3) Add a define file to your project(select a text file and call it "BlockInput.def&quot

In the .def file write :

LIBRARY BlockInput

EXPORTS
BlockInput @1

4) Build the project and BlockInput.DLL will be created probably in the MSVisualStudio/MyProjects/)

directory.

5) Copy the DLL into WINNT/System32.

6) In your VB Module decalre the following :

Declare Sub BlockInput Lib "BlockInput.dll" (ByVal State As Boolean)

7) Now you can use it :

call BlockInput(True) 'Blocks Input
call BlockInput(False) 'Allows input

I hope somebody finds this useful.

Oh, and if anybody wants the DLL let me know.

 

[wolfie78uk]

Oops. This was meant to be a tip!

 

[mcintoshstuff]

Thats great, how would i be able to add in extra control, like locking just the keyboard or just the mouse?
and how could i trap the ctrl+alt+del event?

 

[Digimon02]

I think the function that you created is just the same as the API BlockInput.

What is the difference between your function and the API Block Input if there is any?

 

[mcintoshstuff]

It is, but i am trying to figure out how exactly it is doing what it is doing. How does the code work. I am not very strong with C++ so am not sure about the functionality of this code. I know and can understand the vb side of it though. I am just wondering if there is an additional way to control the mouse and/or keyboard seperate from each other.