SendMessage(MyTargetObject.handle,WM_KEYDOWN,Vk_return,0)
use keydown and keyup to simulate keypress
SendMessage(MyTargetObject.handle,WM_KEYDOWN,Vk_return,0);
SendMessage(MyTargetObject.handle,WM_KEYUP,Vk_return,0);
in linux you need this units:
LCLIntf, Messages, LCLType