I bet you do not need #include <AutoItConstants.au3> line at all, at least for my imagesearch udf not needed.
I recomend you to do not put the imagesearch itself alone in a while loop with mousemove, cause it will keep move your mouse in that position all day long, and you have to close your script if you want to get back the control on it.
If you wana speed up the process, like you are looking for the image non stop if it is apire on your screen multiple times while you are running your script, then use _ImageSearchArea function. You can set a location on your screen where to search for that image. It will help for your CPU.
ImageSearch function second parameter:
Set where the returned x,y location of the image is.
1 for centre of image, 0 for top left of image
So if u wana click on the image use 1.
For the last parameter, i recomended to use greater value then 0, cause it is the tolerance (pixel color difference). 0 mean exactly same image.
for Pause function (standerd version):
Func _PAUSE()
$paused = Not $paused
While $paused
Sleep(100)
ToolTip('Script is "Paused"', 0, 0)
WEnd
ToolTip("", 0, 0)
EndFunc
Edit:
P.S.:
Sry for my english

My german knowleadge is almost 0. :/