On 2017-08-27 14:52, James Richters wrote:
i think you're looking for IPC (InterProcess Communication)... with this, the second instance would load up, find that there is one already running, tell the already running one about the new file to load, and then exit...

Thank you, that is exactly what I want but did not know what it was called.

James


http://wiki.lazarus.freepascal.org/SimpleIPC

FPC has its own ipc unit that makes it pretty easy, and I ported it to a DLL so that any program in any language can communicate with an fpc program
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