To know how transparent key passthough works in the backend and how it affects the behavior of the client window.

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Instructions

Working transparent key is given below,

• Determines how the mapping of certain Windows key combinations are used when 
connecting to ICA sessions. 

• This setting appears in the Citrix Receiver user interface under Session Options page and in 
the Web Interface for Citrix XenApp Settings page. 

• When Local is set, the key combinations apply to the local desktop. 

• When Remote is set, the key combinations apply to seamless and non-seamless ICA 
sessions when their windows have the keyboard focus. 

• When FullScreenOnly is set, the key combinations apply to the non-seamless ICA session 
in full screen mode. 

• The default value is FullScreenOnly. When no TransparentKeyPassthrough setting in the ICA 
file is passed to the ICA Engine, the keyboard transparent feature behaves as if 
FullScreenOnly is set. 

In All_Regions.ini the parameter TransparentKeyPassthrough= is set to "Local" or "Remote" then it's not possible to resize the window of the Citrix application anymore. If the parameter is empty or set to the default value "FullScreenOnly" window resizing should work without any issues.