RemoteApp and Transparency

Question

I use custom application as a Windows RemoteApp. The window of this application does not have a frame. Also the window is transparent in both ways: transparent background and transparent mouse input. This window places above all windows and indicate some changing information.

The problem is that when application works as a RemoteApp the window is created without WS_EX_TRANSPARENT flag. As a result the window is not transparent for mouse input. There is no such problem if application run locally.

Down below presented the pictures of application's window flags:

• Window flags of application running locally
• Window flags of application running as a RemoteApp

I tried to configure my rdp file with different settings, but I didn't find something usefull.

Anyway my rdp file looks like that:

redirectclipboard:i:1
redirectprinters:i:1
redirectcomports:i:0
redirectsmartcards:i:1
devicestoredirect:s:*
drivestoredirect:s:*
redirectdrives:i:1
session bpp:i:32
prompt for credentials on client:i:1
span monitors:i:1
use multimon:i:1
remoteapplicationmode:i:1
server port:i:3389
allow font smoothing:i:1
promptcredentialonce:i:0
videoplaybackmode:i:1
audiocapturemode:i:1
gatewayusagemethod:i:0
gatewayprofileusagemethod:i:1
gatewaycredentialssource:i:0
full address:s:XXX.XXX.XXX.XXX
alternate shell:s:||MyApp
remoteapplicationprogram:s:||MyApp
remoteapplicationname:s:MyApp
remoteapplicationcmdline:s:
workspace id:s:XXX.XXX.XXX.XXX
use redirection server name:i:1
loadbalanceinfo:s:tsv://MS Terminal Services Plugin.1.QuickSessionCollection

Any idea what can be done to make the window transparent for mouse input when application run as RemoteApp?