I don't know if my question was clear!!
but my purpose is:
I want to create an application but this application needs another one to be activated before it is launched.. so I want to call that application when mine start and then do a check box event to that one automatically (programaticaly), then return back to my application..
Is it possible?
I'm not sure if I follow you, but there are a few ways for applications to communicate with eachother. The easiest would be to send a launch code; using the Helper API is a fancy way of doing this.
http://www.palmos.com/dev/support/docs/palmos/AppStartupAndStop.html#972381
From a design perspective, I think the best way to do this is the one that couples the two applications together the very least. To this end, I would have both applications share the format of a preferences file / PDB that one creates on the device. When the checkbox needs to be enabled, I would set the appropriate bit in this preferences file, and then send a launch code to the other app that says "reapply the preferences now." This is a little more extensible than having a very specialized "turn the checkbox on" launch code.
-Jeff Ishaq
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