You can configure your client system so that if a Horizon Client window has focus, then physical keyboard, onscreen keyboard, mouse, and handwriting pad events are sent to the remote desktop or remote application, even if the mouse or onscreen keyboard is outside of the Horizon Client window.
This feature, available with Horizon Client 3.3 and later, is especially useful if you are using an x86-based Windows tablet, such as a Windows Surface Pro. To use this feature, you must set the Windows Registry key EnableSoftKeypad to true. The location of this key depends on the type of system:
For 32-bit Windows: HKEY_LOCAL_MACHINE\Software\VMware, Inc.\VMware VDM\Client\
For 64-bit Windows: HKLM\SOFTWARE\Wow6432Node\VMware, Inc.\VMware VDM\Client\