Stroking keys via USB

[hassanayoub85]

Hello experts,
Can i use your USB control for c# to give my PC keyboard strokes form .net application running ona tablet PC?Like by pressing a button on a tablet pc, it will send Ctrl+Esc to the PC.
Thx in advanced

[Jan Axelson]

SendKeys can send keystrokes:

http://msdn.microsoft.com/en-us/library/system.windows.forms.sendkeys.aspx

[hassanayoub85]

Thx for it, but I know it.
This will work well if the keystrokes sender application is hosted on the same PC where the application which I want to apply the strokes on is.
While my scenario is different:
1- PC have an application running.
2- Tablet PC have the key strokes application running.
I want to press a button on the tablet PC which is connected through usb to the PC, then the main applicaiton on the PC will get this strokes (Shift+1, Ctrl+ESC) and act with it.
So simple, the tablet pc should be a keyboard for the normal PC.

[Jan Axelson]

To communicate with the PC, the tablet PC would need to have a USB device port so you can attach a USB cable.

You might look into sending the codes via a network interface, then use SendKeys to send the codes to an application.

[hassanayoub85]

I see, and that's what I am searching for!!!
How can I send commands from tablet to ps through usb?
Dont i need a control like yours?

[Jan Axelson]

You can't do it directly unless your tablet PC has a USB device or OTG port. A device port has a series-B, mini-B, or micro-B connector. An OTG port has a mini-AB or micro-AB connector:

http://www.cablestogo.com/resources/usb.asp

You could use a PC/PC USB bridge cable to create a network connection between the PCs:

http://www.hardwaresecrets.com/article/Connecting-Two-PCs-Using-a-USB-USB-Cable/248

[hassanayoub85]

So do u mean, I use the usb cable to make a network by tablet and pc, or even using normal network cable.
And then develop the application to send data as sockets like client server application, then I sendkeystrokes on the PC which are recieved by network (USB or lan) from the tablet?

[Jan Axelson]

Yes, that's the only way I can think of offhand to do it.

[hassanayoub85]

Ok i see.
So where is the usage of yur usb control?
Doesnt it work like serial control? so i can easly select the serial port and pass the key to it?

[Jan Axelson]

If you mean my USB HID example application, my HID page has example firmware with descriptors for a HID that sends and receives vendor-defined data.

http://www.lvr.com/hidpage.htm#MyExampleCode

A HID is not a USB virtual serial port device, which functions at the application level just like a physical serial port device: it can send and receive any type of data.

[hassanayoub85]

So cant I use your control to hande the usb on bothe sides, and by then exchange data?

[Jan Axelson]

No, you would need the tablet PC to function as a HID device, and the tablet PC likely only has a USB host port.

A USB bridge cable creates a network connection.

Not to confuse the issue, but you can also use two USB/serial adapters with a null modem adapter in between. Then the two PCs can communicate over virtual COM ports.

[hassanayoub85]

I see.
Thx alot for your cooperation and help, u r really an expert.
Just last thing.
So where is the usage of your USb control?

[Jan Axelson]

My HID page has example firmware with descriptors for a HID that sends and receives vendor-defined data.

http://www.lvr.com/hidpage.htm#MyExampleCode

Devices that use this firmware can communicate with my example PC generic HID application, as can other HIDs except system keyboards and mice.

[hassanayoub85]

mmm, it's ok.
Thx alot