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John-Silver · Joined: 30 Jul 2013 Posts: 1520 Location: Aerospace Valley

If I want to write data from another program running in parallel to a Window created in CLEARWIN+ (a format window), what is the reference of the window ? Is the 'handle' given in CLEARWIN how Windows recognises the window also or is there a more complicated reference system and if so is it obtainable via a CLAERWIN command ?
Thanks
John

PaulLaidler · Posted: Fri Apr 11, 2014 9:19 am Post subject:

A ClearWin+ window can be identified by its Microsoft Windows handle and you can get this via %hw. But this does not mean that you can write to a Window from another process. There are various ways to do "dynamic data exchange". At the simplest level you could start by looking at %rm.

LitusSaxonicum · Posted: Fri Apr 11, 2014 12:13 pm Post subject:

If you want to send a small amount of data, send it via a Windows message. If it is a large amount of data, get your other application to write it to a file, send the filename via a Windows message, receive the message and open the file in the Clearwin application. If the time elapsed between writing the file and reading it is short, it will still be in the disk cache, and it will be read at RAM speeds.

In the main window setting routine of the program that receives a message, you need to set its class (in this case MyName), and a callback function to respond to a message (MESSAGE_FN in this case):

John-Silver · Joined: 30 Jul 2013 Posts: 1520 Location: Aerospace Valley

Hi,
That's great, the windows handle is indeed the identifier as I suspected. The other application CAN (apparently, let's see) write directly to a Windows window, it just needs the ID. Thanks for the supplementary info anyway Eddie. That's what I like about this forum, even when you ask a simple question there's always someone willing to reply with additional info. which makes it great for people like me to learn new tricks. Thanks again to you both, I'll let you know how I get on Smile

Cheers John