simulate arrow key events in labview - (Multiple Key Press)

[m@t]

Hello,

I am trying to simulate the arrow key events (left, right, up & down) in labview. Lets say I would like the events to happend when a slider bar goes beyond a certain threshlold (later I will inteface it with a daq).

I found this example but, I can not figure out how to move the arrow keys (and I have not experiance with the User32.dll):

http://zone.ni.com/devzone/cda/epd/p/id/3711

I would really appreciate the help.

Many thanks

[Yamaeda]

If i understand you correctly, you want to make the program "press the arrow keys"?

If so, you can use the arrow keys Value(signalling)-property to create an event which will be handled as if you pressed the arrow key yourself.

does this help?

/Yamaeda

[yenknip · Accepted solution]

I searched around for a while, but I can't remember where on the forums I initially found this VI so I can't give due credit.

It is similar to the VI you posted simulating a keyboard, but it would proably suit your needs better

[m@t]

Thank you thank you a lot. This is what I needed!!!

... it took me long enought to reply 😞

[Sinoj S Beginer]

Hi,

    I need to get multiple-key-press of arrow-keys. i.e., if I press Up-Arrow-Key, keep hold it down, while being pressed down press Left-Arrow-Key and keep it pressed(now both keys are pressed First: Up, Second: Left). Now my requirement is I need to get the following sequence of Key-Values -

Up-Key, Left-Key, Up-Key, Left-Key, Up-Key, Left-Key ...etc., 

as long as both keys are kept dow.

-Any help is appreciated

-Beginer

[yenknip]

If you use the VI I posted, simulate keyboard.vi then you can define the type of keypress that is performed. Your choice of [key down] [Down then Up] [Key release]

 

Message Edited by yenknip on 03-26-2009 10:13 AM

[Sinoj S Beginer]

Hi,

    Is it possible to get an 8.2 or lower version of the vi?

-Rgds

-sbs

[yenknip]

Here's it in 8.0

Message Edited by yenknip on 03-31-2009 10:13 AM

[Sinoj S Beginer]

Hi Yenknip, Thanks for your help. My purpose is to make a Wreless-Wheeled-Robort which could be controlled/monitored from a PC(LabVIEW). Interface to the wireless-transceiver section at PC-side will be USB(VirtualCOM-Port). Actually I have to acquire the key-strokes from an actual keyboard(H/W) attached to the PC. It seems to me that it might be possible with 'keyboadAcquire.vi' which comes along with LabVIEW vi-lib. I had just a glance on this vi. I think modifications might be needed on 'how to manage multiple-key-press'. Am I right? -Rgds -sbs

[yenknip]

If you want to aquire keyboard strokes, the easiest method is to use the event structure, you can check for the type of key press. However it is not available in the base package - if you have the base LabVIEW package you will need to poll the keyboard or monitor user32.dll for keyboard presses.