I downloaded the latest driver for Wacom Bamboo tablet and installed on my computer. I found the solution I was looking for, and he generates exactly the keyboard as in the screenshot I provided above.
Is it possible to have the onscreen keyboard displayed automatically or at least didn't have only a click of the mouse away as in the following image. However, to access the on-screen keyboard to enter the password, I have to click on the icon of accessibility at the bottom left, and then check the keyboard and then click OK. The only physical input device is a wireless mouse that I use to click on the password when connecting.
I built my computer as a HTPC, so there is no physical keyboard. How can I get an on-screen keyboard appears automatically in the login screen of Windows 7 Home Premium?