The FME_INIT event is triggered before the FM dialog is displayed.
To activate this event you need to use "(Dialog)?: (initevent)?".
You can use the previous value to check if the plug-in is executed for the first
time in the host. In that case (previous)?==false.


1) Using the instruction (setDialogEvent)?(1) allows also to enable the FME_INIT event.
However, it isn't recommended to use that by default, as it won't work for the very first launch of the plug-in.

2) For your convenience, this event is also triggered each time you recompile the code of your plug-in.


Dialog: initevent

OnCtl(n): {
    if (e==FME_INIT) {
        if (!previous) Info("plug-in launched for first time");
        else Info("plug-in just launched or recompiled");
    return false;

Also see

FME_CANCEL, (previous)?, (setDialogEvent)?,(initevent)?, (Dialog)?


Everyone can add his comments about his experiences with this event here. Tips for using it are welcome, too.