Windows: Open image with LC EXE

[Paul Dupuis]

Hi Bob,

In our case, we have a Windows app that has multiple document types. We 
wanted it to behave like a "real" Windows app and (1) register it's 
multiple documents and icons since the Standalone builder limits you to 
a single document type (extension) and icon; and (2) check to see if the 
document types have a different application as their default app and if, 
so, ask the user if they want our app to be associated with those file 
types.

To use the setRegistry function in LiveCode, the process (application / 
EXE) must run with privileges. So we made a single stack application 
called Helper that is written in LiveCode that sits in a small timed 
loop looking for input using "  read from stdin until cr"

When our main app needs to change Registry settings (on startup), it use 
the LiveCode 'open elevated process "Helper.exe" ' command to start up 
the Helper.exe standalone as an elevated (or privileged) sub-process and 
then uses read from <process> and write to <process> to send messages 
with the registry settings as parameters and the Helper.exe updates the 
registry.

So, for Adobe, you would need to know whether Adobe Reader supports 
Interprocess Communication (IPC) and if it does, what are the messages 
and responses (the APIs of its IPC) that it supports. Then use open 
process and read from process and write to process to communicate with it.


On 3/6/2019 6:42 PM, Bob Sneidar via use-livecode wrote:
> Hi Paul. I'd be interested in how you do that. I would love to be able to tell Adobe Reader to fill a form directly (as opposed to auto-loading an .fdf file), but was under the impression you had to write some kind of C app which included the API provided by Adobe to do that.
>
> Bob S
>
>
>> On Mar 6, 2019, at 09:13 , Paul Dupuis via use-livecode <use-livecode at lists.runrev.com> wrote:
>>
>> Our app ships with a separate helper app (another LC standalone/EXE) that receives instructions from the main app via interprocess
>
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