There are several possibilties using the IMG Developer's Kit - available here
OnScreen does not include the Developer's Kit by default, but it can be downloaded and unzipped as appropriate for the user/system. The DevKit sub-folder has useful utilities for manipulating the keyboard externally - specifically the FWCTLMTS.EXE (Find Window and Control), MINMZMTS.EXE (Minimize), OPEN_MTS.EXE (Open).
In the DevKit folder, the FWCTLMTS.EXE is designed to toggle OnScreen (My-T-Soft Family) off-screen (not visible)/ on-screen (visible). By creating a shortcut to this utility on the user's desktop, then go into the shortcut properties, you can add a Shortcut key (e.g. Ctrl-Alt-X) to trigger the shortcut itself. Then when a Ctrl-Alt-X occurs (via physical keyboard or OnScreen), the OnScreen keyboard window will be toggled "off-screen". Press Ctrl-Alt-X to bring it back. Ctrl-Alt-X will toggle access to OnScreen & control the screen real estate as desired by the user.
Alternatively, using a Minimize/Open (MINMZMTS.EXE / OPEN_MTS.EXE) approach with 2 different shortcuts (e.g. Ctrl-Alt-A / Ctrl-Alt-Z) can perform the same general operation, but leaves the software available in its minimized state.

Notes:

• Depending on product, release version, OS version, and specific technical issue, some tech items are very specific, and some may span to other products/versions
• Downloadable files can also be accessed by anonymous FTP at ftp://downloads.imgpresents.com
• Older files are moved into a separate archive location - see notes/details/new location in *.archived.txt text file

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